2005 Jeep Grand Cherokee

Re: Jeep 4WD systems.

dcampen said:
This answers some of my questions about the Jeep 4WD systems:
http://www.allpar.com/model/jeep/grand-cherokee-2005.html

The LSD system seems awfully complicated though. One nice thing is that the transfer case has a neutral position you can use for towing the vehicle, it would be nice if the 4Runner had this.

Currently, the QDII uses hydraulics & clutch packs to operate the side-to-side torque transfer across an axle. As discussed in the posts above, QDII is not as effective as Jeep claims.

I figure that the new ELSD system is the same crap except that the transfer is now electronic, instead of hydraulic. This would make sense because it allows for the incorporation of stability control system (aka VSC), which was not possible before with the hydraulic system.
 
Re: Jeep 4WD systems.

dcampen said:
The LSD system seems awfully complicated though. One nice thing is that the transfer case has a neutral position you can use for towing the vehicle, it would be nice if the 4Runner had this.

I never could understand this about the 4runner...the Lexus GX470 has a true transfer case with Neutral position. I think that Toyota has the logic the wrong way...Lexus should have the electronic dial while 4runner gets the true transfer case.
 
2005 Jeep Grand Cherokee Design

Auburn Hills, MI - When it came time to redesign the all-new 2005 Jeep® Grand Cherokee, keeping what customers love about the vehicle and breaking new ground to improve its design was a delicate balance.

“There is no doubt the Jeep brand is an American icon, so it’s important we stay true to the Grand Cherokee’s design heritage as well as the elements customers tell us they love about the vehicle,” said Rick Aneiros, Vice President - Jeep/Truck Design. “We’ve taken some of the traditional design cues and moved them forward to capture a look and feel that’s refreshing and timeless. The result is nothing short of an authentic Jeep.”

Exterior Form is Poised and Ready to Take Action
With its upright and substantial posture, the 2005 Jeep Grand Cherokee’s new design offers an athletic and contemporary appearance. The new exterior design has a higher belt line and a reduced glass-to-body proportion. Signature features of the vehicle remain, such as the seven-slot grille which boldly dominates the front view. The Grand Cherokee Laredo will feature a painted body color grille, while a chrome-plated grille will accent the Limited.

“The challenge with Jeep design is to capture that limitless capability and attitude with an appearance that is fresh, fitting and timeless,” said John Sgalia, Director - Jeep Interior and Exterior Design. “Additionally, we know there are certain elements that can’t change on a Jeep because our customer base is very knowledgeable and has very specific demands.”

High-performance halogen headlamps employ a rounded traditional Jeep appearance and gracefully integrate into a powerful hood form. The hood features sophisticated nacelles – hood forms that protect and shelter the headlamps. The hood, air dam and exterior mirrors were developed in the Chrysler Group’s wind tunnel in Auburn Hills, MI, to minimize wind noise and maximize aerodynamics.

The shape of the body has been thoughtfully designed to protect the sides of the vehicle from potential road debris thrown off the tires. The heavy and expensive cladding used on the previous model is replaced with a more efficient body-side shape and moldings that are incorporated into the design. The body-side molding also has the integrated Grand Cherokee name for a quality look and feel.

At the side, a proportionately longer hood and greater distance between the center of the front axle and base of windshield visually communicates more engine emphasis to achieve a more powerful image.

At the rear, larger taillamps feature red and clear lenses for a look that presents a luxurious feel without being gaudy. Badges are now injection-molded and chrome-plated to communicate a richness and sense of precision.

“The Grand Cherokee driver expects a high level of comfort and refinement and also wants to know the legendary Jeep capability and core values are still there when they need them,” said Mark Allen, Design Manager and the 2005 Grand Cherokee’s exterior designer. “The 2005 model was designed with that credo.”

Interior Design Both Elegant and Functional
The 2005 Jeep Grand Cherokee takes capability and refinement to new levels, proving there’s no reason a capable vehicle can’t be comfortable and polished. A new and inviting interior awaits occupants with a rich two-tone instrument panel treatment, new door trims and upscale interior finishes.

The seats are beautifully crafted with contours that are precise, firm and ergonomic, featuring a new robust structure. They are purpose-built and designed for long-distance comfort with trim styles different for each model: Laredo features cloth and optional leather while Limited seats are two-tone leather with perforated leather seat inserts.

The dramatic and elegant instrument panel design offers a high degree of precision. The instrument panel features a dark upper color and lighter lower color. Multiple storage bins have been added for additional storage.

“Quality isn’t just the workings of the interior but the perception the customer feels when he or she is in the vehicle,” said Clyde Ney, Design Manager and the 2005 Jeep Grand Cherokee’s interior designer. “The touch points, the sound the switches make, the fit and finish, the textures and lighter colors are all vital to a quality experience because that’s where the occupants literally live while traveling.”

A new precise four-gauge instrument cluster with LED illumination features black gauges surrounded with red pointers, for reading ease in all lighting conditions. On the Limited model, the gauges are surrounded by chrome accent rings.

In the cargo area, versatility and storage reign. A new reversible load floor panel is carpeted on one side and offers easy-to-clean plastic on the other. The plastic side includes a large shallow tray for additional utility.
 
2005 Jeep Grand Cherokee Overview

Auburn Hills, MI - Since its introduction in 1992, the Jeep® Grand Cherokee has revolutionized the sport-utility market. With best-in-class tractive capability and best-in-class power, the all-new 2005 Jeep Grand Cherokee is designed, engineered and built to master every imaginable day-to-day driving condition, whether on-road or off-road.

The third generation Jeep Grand Cherokee offers improved capability and superior on-road ride and handling in a well-appointed package with a number of new premium amenities. The result is a Jeep that is all-new from the ground up, and all Jeep from the inside out.

“Whether it’s the outback or the opera that your travels lead you to, the all-new Trail-RatedTM Jeep Grand Cherokee cuts a trail no other SUV can follow,” said Jeff Bell, Vice President – Jeep. “Just as it did when it first debuted on the market, the 2005 Jeep Grand Cherokee sets the benchmark for off-road capability and continues to do so for on-road refinement.”

Class-Leading Four-Wheel Drive Capabilities

Three new full-time four-wheel drive systems are available on Jeep Grand Cherokee. Quadra-Trac® I utilizes the NV140 single-speed transfer case to provide convenient full-time four-wheel drive with no transfer case lever to shift or driver interaction required. Offering a single-speed transfer case attracts a new group of buyers to the Jeep Grand Cherokee lineup, and builds on the capable, entry-level, two-wheel drive versions that currently account for approximately 25 percent of Jeep vehicle sales.

Quadra-Trac® II incorporates the new NV245 transfer case that provides full-time active four-wheel drive, which anticipates and prevents wheel slip for optimum traction during a wide range of conditions. The NV245 also includes electronic shift with a true low-range gear and neutral for towing Grand Cherokee behind another vehicle. Quadra-Drive® II takes unparalleled Jeep capability to an even higher plateau using Electronic Limited Slip Differentials (ELSD) – front/center/rear – offering customers the ultimate in off-road capability. ELSD replaces the Vari-Lock® progressive axles used on the Quadra-Drive system from previous generation Jeep vehicles for even quicker response to changing conditions and greater torque capacity.

New Engines Delivering Performance and Power
For the first time ever, the 5.7-liter HEMI® V-8 engine is available on a Jeep vehicle to provide best-in-class power. The 3.7-liter SOHC V-6 will replace and deliver even more peak power than the previous 4.0-liter I-6 engine in the Jeep Grand Cherokee lineup. And, the 4.7-liter SOHC V-8 engine will also continue to be available on Jeep Grand Cherokee.

Jeep Grand Cherokee is the first sport-utility vehicle to offer the Multi-Displacement System (MDS). MDS deactivates half the cylinders of the 5.7-liter HEMI during cruising and light acceleration to increase fuel economy by up to 20 percent, depending on driving conditions. Ninety percent of peak torque is available from 2400 to 5100 rpm for excellent performance while trailer towing or traveling off-road, as well as city and highway driving. A sophisticated Electronic Throttle Control (ETC) system tailors throttle response to pedal movement based on operating conditions, and maintains more consistent vehicle speed on rolling grades when cruise control is active than the former mechanical throttle control system.

With approximately seven percent less displacement, the 3.7-liter V-6 generates more peak power than the 4.0-liter I-6 engine it replaces, while producing comparable torque. The engine also provides smoother, quieter operation, added durability, and contributes to better packaging. This engine, first introduced on Jeep Liberty and Dodge Ram models, shares many design features with the 4.7-liter Power Tech V-8 engine.

All-New Suspension and Steering System Provides Best-in-Class Ride and Handling

An all-new independent front suspension provides the driver with a greater sense of precision and control, more precise steering, and reduces vehicle weight and head toss. Front suspension wheel travel is increased by almost 10 percent over the previous generation vehicle, and a tight turning diameter of 37.1 ft. is tighter than the current Jeep Grand Cherokee to provide even more nimble handling.

The new five-link rear suspension geometry, including a track bar, also improves lateral stiffness to match that of the front suspension for optimum handling.

The innovative Dynamic Handling System (DHS) will be available with the 5.7-liter HEMI engine – a Chrysler Group first application of a hydraulic-controlled active stabilizer system. DHS delivers a high level of driver confidence by significantly reducing body roll, resulting in sportier handling when turning or maneuvering, while providing a smoother ride when traveling straight ahead. DHS will be a late availability offering on the 2005 Jeep Grand Cherokee.

Also offered for the first time on the Jeep Grand Cherokee is an Electronic Stability Program (ESP), which aids the driver in maintaining vehicle directional stability in severe driving maneuvers on any type of surface. Using signals from sensors throughout the vehicle, the system determines the appropriate brake and throttle adjustments for directional stability of the vehicle.

Grand Cherokee’s new rack and pinion steering system imparts a more precise steering feel translated to the driver through fewer linkages than a recirculating ball steering system. Even with the 2.5-inch increase in track, Grand Cherokee’s nimbleness and tight turning diameter are maintained with the new steering system.

All-New Five-Speed Automatic Offers Premium Refinement
An all-new five-speed automatic transmission offers smooth shifts and optimum fuel economy with the 3.7-liter V-6. The 545RFE five-speed automatic transmission used with the 4.7-liter V-8 and 5.7-liter V-8 HEMI has been refined for higher-quality shifts while increasing the Grand Cherokee’s maximum towing capacity.

Both transmissions feature Electronic Range Select (ERS) driver interactive shift control for the first time on Grand Cherokee. The shifter provides fully automated shifting when in the “drive” position, or the driver can manually select each gear by simply moving the shifter left and right from the “drive” position. This gives the driver control to precisely match any on-road or off-road driving requirement.

A new skid plate group is available, which includes a stamped steel transfer case skid plate that mounts to the transmission cross member and a fuel tank skid plate that provides off-road protection to the transfer case.

Legendary Grand Cherokee Size, Styling and Comfort
Grand Cherokee’s new design provides a contemporary return of an athletic appearance. Up front, the signature seven-slot grille, flanked by the functional round appearance high-performance halogen headlamps, boldly dominates the design statement. These round headlamps unify the unmistakable front-end appearance of the entire Jeep lineup. A proportionally longer hood and greater distance between the center of the front axle and base of the windshield visually communicates a more powerful image. Helping to achieve a more athletic appearance is a flatter windshield and faster A-pillar. The overall design also helps to improve vehicle aerodynamics and vehicle fuel economy. The body is shrink-wrapped to the package, enabling designers to emphasize the powerful wheel flares. Larger taillamps in the rear feature red and clear lenses for an upscale appearance. Overall, the 2005 Jeep Grand Cherokee preserves the right-size package that is critical for off-road use and provides nimble on-road handling.

All-New Interior Provides Next Generation Sophistication
Grand Cherokee’s new interior is rich and inviting with a two-tone instrument panel, door trim and new finishes. Seat contours are precise and ergonomic with increased seat track travel. Increased headroom adds a feeling of even more spaciousness to the interior. The dramatic and elegant instrument panel design offers a high degree of precision and control. In the cargo area, features, such as a reversible load floor panel, enhance versatility and storage. New premium amenities, including GPS Navigation radio, rear seat DVD, Boston Acoustics audio, UConnect™ hands-free communication system, Smart Beam® and ParkSense™, rear park assist, will be available on the new Jeep Grand Cherokee.

Jeep Trail Rated
The Jeep Trail Rated badge communicates that the vehicle has been designed to perform in a variety of challenging off-road conditions identified by five key consumer-oriented performance categories: Traction, Ground Clearance, Maneuverability, Articulation and Water Fording.

Jeep Trail Rated is an industry-leading methodology established by the Nevada Automotive Test Center (NATC) and Jeep Engineering to objectively measure and consistently predict off-road performance for all Jeep vehicles today and into the future. Through a combination of natural and controlled field tests, as well as computer-simulated environments, Jeep Trail Rated provides a repeatable and consistent measurement of off-road performance for Jeep vehicles. Only Jeep vehicles are Trail Rated.

The 2005 Jeep Grand Cherokee will be produced at the Jefferson North Assembly Plant in Detroit, starting in the third quarter of 2004. Assembly for markets outside North America will begin next year at the Magna Steyr assembly plant in Graz, Austria.
 
4x4 SYSTEMS

With three distinct 4x4 systems that combine the legendary Jeep® off-road capability with refined on-road driving manners, the all-new 2005 Jeep Grand Cherokee sets a new benchmark in the SUV market. Three unique 4x4 systems offer customers the ability to decide what system suits their driving needs.

“The legendary reputation of the Jeep Grand Cherokee is based on its 4x4 systems,” said Craig Love, Vice President, Rear Wheel Drive Product Team and Core Team Leader. “The Jeep engineering team made significant strides to ensure that the 2005 Jeep Grand Cherokee not only maintained its off-road reputation, but also improved its on-road driving manners. Now, customers have the ability to choose a Jeep-engineered 4x4 system that’s almost tailor-made for their driving needs, be it everyday driving or tackling the most difficult off-road terrain.”

Quadra-Trac I®

For Jeep Grand Cherokee customers who want the assurance of full-time, four-wheel drive without any switches or levers to pull, the Quadra-Trac I is the right system. The system provides for smooth operation of the vehicle over a variety of road surface conditions.

The NV140 transfer case splits torque 48/52 percent (front/rear) for nearly even distribution of engine power. The single-speed transfer case has been designed to rigorous Jeep durability standards while offering smooth and quiet operation. The use of the Brake Traction Control System (BTCS) with the NV140 transfer case makes the 4x4 system extremely competent in a variety of situations.

“Offering a single-speed transfer case attracts a new group of buyers to the Jeep Grand Cherokee lineup and builds on the capable, entry-level, two-wheel drive versions, which currently account for approximately 25 percent of Jeep vehicle sales,” said Love.

Quadra-Trac II®

The Quadra-Trac II 4x4 system for 2005 Jeep Grand Cherokee gives the customer the benefit of the NV245 active transfer case and BTCS.

The transfer case is the same one used in the Quadra-Drive II® system. It takes input from a variety of sensors to determine tire slip at the earliest possible moment and take corrective action. The system also uses Throttle Anticipate – sensing quick movement in throttle from a stop – and takes steps to maximize traction before tire slippage even occurs.

Torque is transferred to the individual wheels as needed by the BTCS to maintain traction in changing road conditions. When the system senses tire slip, it modulates brake pressure to the slipping wheel, which directs torque to the tires with the best traction.

Quadra-Trac II features an electronic shift mechanism for ease-of-use. The transfer case also includes a neutral position for trouble-free towing behind another vehicle.

Quadra-Drive II®

The Quadra-Drive II Jeep 4x4 system offers customers the ultimate in off-road capability. It combines the NV245 full-time transfer case with Electronic Limited Slip Differentials (ELSD) for best-in-class tractive performance. The system instantly detects tire slip and smoothly distributes engine torque to the tires with traction. In some cases, the vehicle will even anticipate low traction and adjust to proactively limit or eliminate slip.

The heart of the system is the NV245 active transfer case. This transfer case includes a center differential coupled with an electronically controlled clutch pack, varying it from a completely open state to completely locked, and infinite possibilities in between. The 4-Low gear ratio is 2.72:1.

A key component in the Quadra-Drive II system is the ELSD – an industry-first application – and the new benchmark for automatic traction differentials. The ELSD uses electronically controlled clutch packs to automatically and instantly vary from slip to lock at each axle. This maximizes traction when needed without any of the on-road drawbacks normally associated with such a robust 4x4 system.

All components of the system work together, continually monitoring needs, to provide smooth and automatic application of the components for best-in-class tractive performance while improving the day-to-day on-road driving experience. For example, the ELSD releases the clutch packs in the front axle during turns to allow differentiation and prevent crow hop.
 
2005 Jeep Grand Electronics

Auburn Hills, MI - In an effort to improve the overall driving experience of the all-new 2005 Jeep® Grand Cherokee, the Chrysler Group has enhanced its vehicle communication options through practical applications, all of which can be experienced at the touch of a button.

UConnect™ Hands-Free Communication System
The UConnect hands-free communication system uses Bluetooth® technology to provide wireless communication between the customer’s compatible cellular telephone and the vehicle’s on-board receiver. Bluetooth is a short-range wireless networking technology that is used to connect two or more devices together."As the number of drivers using cell phones increases, hands-free, voice-activated technology is the easiest way to connect a driver to a cell phone call safely," said Jack Withrow, Director - Vehicle Entertainment Communications. "We were the first North American automaker to offer its customers a Bluetooth-enabled automotive dealer-installed application last year."The factory-installed version allows the audio to be heard through the vehicle’s radio speakers, and a control pad and microphone are housed in the rearview mirror, serving as the driver interface. UConnect factory-installation is $275 and is available on the 2005 Jeep Grand Cherokee and many other 2005 Chrysler Group products.UConnect features the following:

Voice dialing – Voice commands can be used to digit-dial the phone or access pre-stored voice tags Audio address book – Enables customers to store up to 32 names, four numbers per name, for a total of 128 phone numbers Audio system mute – Mutes the microphone for privacy Call transfer – Allows the customer to transfer a call from the vehicle’s system to the mobile phone
Communicates in three languages – French, Spanish and English
Multi-phone recognition – Up to five phones can be used within one vehicle’s system

UConnect is also available as a dealer-installed option. Dealer installation is $299 (suggested retail price) plus labor, and available on all Chrysler, Dodge and Jeep vehicles dating back to 1994; excluding Jeep Wrangler, Chrysler Sebring Convertible and Chrysler Crossfire Convertible.REC Navigation Radio System
The DVD-based navigation system has features that will appeal to both road travelers and music enthusiasts alike. The REC navigation system is housed in the center of the dashboard, which is convenient to both the driver and passenger. A large 5.8 inch full-color display features an MP3 player (a navigation-system first), AM/FM stereo, six-disc CD system and navigation system in one unit. A joystick allows the user to scroll through the navigation menus and icons quickly and effortlessly.Utilizing voice commands, the system guides the user through the drive route, mile-by-mile, turn-by-turn until the final destination is reached. Destinations can be entered into the system 10 different ways and the screen can be viewed as a detailed map, or enlarged to display turn-by-turn directions.The REC navigation system features a single DVD, which contains mapping, points of interest and business phone numbers across the U.S., where digitized mapping data and information are available. When a destination is entered, the navigation system uses data from the DVD to quickly calculate the route, providing information within seconds.REC navigation system features:

Map Zoom – Select from nine different zoom scales to increase or decrease map magnification Voice Guidance – Choose from four options: Maximum, Normal, Minimum or Off Route Guidance – View the screen as a turn-by-turn map, full display map or a combination of both Three Language Option – Select English, French or Spanish. Preferences are in miles or kilometers Five Routing Methods – Shortest Route, Quickest Route, Minimize Toll Roads, Maximize Freeway and Minimize Freeway Automatic Route Recalculation and Detour Functions – The system automatically recalculates the position and displays a new route should the user encounter a detour or stray from the directions indicated on the display monitor
Maneuver List – Review the trip itinerary prior to departure and make changes before heading out on the road
Trail Function – Obtain longitude, latitude and altitude information

SIRIUS Satellite Radio
SIRIUS provides Chrysler, Dodge and Jeep customers with 100 streams of the best music, entertainment and information coast-to-coast. SIRIUS offers 60 music streams of commercial-free music along with 40 sports, news and entertainment streams, 24 hours a day.Consumers selecting the SIRIUS Satellite Radio option will receive a small, mouse-sized antenna mounted to the roof of the vehicle. Station selection with the radio is easy. Consumers will be able to scan channels or select pre-set buttons for favorite channels. Consumers will also be able to search both by music category and channel, which will be displayed on the radio screen.The Chrysler Group offers SIRIUS satellite radio as both a dealer- and factory-installed feature. Factory installation for 2005 model year Chrysler Group products is being offered at $195 (suggested retail price) and includes a one-year SIRIUS subscription. The suggested retail price for dealer-installation on previous model year vehicles is $299 plus labor, in addition to a SIRIUS subscription of $12.95 per month.Rear-Seat
Entertainment System A DVD entertainment system – consisting of center-console-mounted DVD player, overhead LCD monitor, wireless remote control, and two wireless headsets – is located for rear-seat passenger enjoyment. In addition to video DVDs, the system will play audio DVDs, audio CDs, MP3 audio discs and video CDs. There are also plug-in jacks on the housing to show video from a video camera, connect video games for display on the screen and play music directly from an MP3 player.A unique feature of the DVD entertainment system, operated by the remote control unit and made possible by the vehicle’s Controller Area Network system, is the ability of the vehicle speakers to play audio from a disc in the DVD player while the headphones play audio from the satellite radio, AM/FM radio, or a disc in the radio CD player.

“Chrysler Group’s vehicle communications strategy places an emphasis on creating a safe driving environment through practical innovations, while enabling customers to choose the services they want,” said Withrow. “It’s all about simplicity, safety, freedom and flexibility.”
 
2005 Jeep Grand Cherokee Quality, Durability and Safety

Auburn Hills, MI - The 2005 Jeep® Grand Cherokee blends past and future by evolving its heritage into a sophisticated and contemporary execution of an icon while using state-of-the-art technology to produce the highest quality vehicle possible.

“Quality is the lifeblood of any vehicle and company, but when that vehicle is a Jeep, all bars are raised,” said Stephen Walukas, Vice President, Corporate Quality. “Jeep owners know that quality has to be a priority if they are going to use their vehicle like no other sport-utility vehicle in the world.”

The 2005 Jeep Grand Cherokee was designed and engineered under the Chrysler Development System (CDS), the comprehensive, coordinated and disciplined product creation process that improves quality and speed-to-market while reducing costs and encouraging practical innovation in new products.

An emphasis in CDS is the systems engineering, design and up-front planning to avoid time-consuming and costly trial and error or changes during the latter phases of the product development cycle. With CDS, all product and process planning is completed and fully integrated before production tooling begins.

The system works: For Grand Cherokee alone, warranty repairs and expenses have been reduced by more than 60 percent in the past five years.

In external quality metrics, the Chrysler Group brands continue to make dramatic year-over-year improvements, prompting the results in one quality image survey, known as the Strategic Position Study, to show a four percent improvement – more than any other manufacturer in the study.

The improvements in quality are reinforced with the 7-year/70,000 mile Limited Powertrain Warranty on the Jeep Grand Cherokee and other Chrysler Group products.

Development of the 2005 Jeep Grand Cherokee involved the work of hundreds of engineers along with the world-class testing facilities at the DaimlerChrysler Technology Center (DCTC) in Auburn Hills, Mich., and proving grounds located in Michigan and Arizona. These engineers logged more than seven million miles of customer equivalent driving and experience in the vehicle.

The vehicle also benefited from a new $37 million Aero-Acoustic Wind Tunnel at the company’s Technology Center, which was completed in the summer of 2002, along with environmental simulators on site. Engineers had the opportunity to test early, full-size clay models more than 700 times to analyze various configurations of the design to make aerodynamic changes as well as to validate cooling and wind noise goals.

For example, dynamic sealing (essentially, weather strips) were strategically placed throughout the vehicle as a result of items learned during testing. Exact placement of the sealing included additional cut line coverage to decrease wind noise; lower coverage to decrease road noise; and, upper auxiliary seals improve water and wind management. In addition, an increased use of cavity foam and environmentally friendly water-borne sound dampening were applied in the body and paint sealing process at the manufacturing level as a result of the testing.

In fact, literally hundreds of hours were spent in test labs to minimize noise, vibration and harshness (NVH). In the area of wind noise, testing revealed many reduction enablers to assist in the design, NVH and engineering process. This included the ultimate shaping of mirrors, A-pillar geometry, thickness on side glass portions, and seals on the door glass runs and at the upper C-pillar and lift gate.

In addition to wind noise reductions, the team used extensive testing and data to refine the new Grand Cherokee’s powertrain, providing both hardware refinements and acoustic treatments. In particular, control of critical axle assemblies – such as ring and pinion mesh profiles that were selected for minimum gear noise – were key factors in NVH reductions. In addition, individual component and system balancing, as well as tightened tolerances on the rear drive shafts, were elements that were implemented early in the vehicle’s development.

Grand Cherokee vehicles underwent extreme body torsion and suspension articulation in tests such as “AK3”. AK3 is derived from the original test used to qualify Jeep vehicles for military use. Several of the new Grand Cherokee vehicles successfully completed back-to-back AK3 cycles. This helps to ensure that the new Grand Cherokee will meet or exceed customer durability and reliability requirements.

Four separate “Lap of America” trips were initiated during the phases of development to validate all aspects of vehicle performance to Jeep customer requirements. Trips from Detroit to all areas of the United States were taken to ensure the function of all systems under all ranges of customer use, including trailer tow and altitude testing.

Validation trips worldwide also were conducted from – 41 degrees Fahrenheit to 122 degrees Fahrenheit in such locations and conditions as:

Chile Cold weather validation and altitude test to 14,000 ft.

Manitoba, Canada Cold weather validation

Sweden Electronic Stability Program development/four-wheel drive system development

Switzerland Mountainous durability testing

Death Valley, Calif. Hot weather validation

Texas Humid weather durability testing

Moab, Utah Off-road development/verification

Rubicon Trail, Nev. Off-road development/verification

Daniel Boone National Forest, Ky. Off-road development/verification

All of these elements are proof that not only is there “one” Jeep, but one type of Jeep testing when it comes to quality: Extreme.
 
ACTIVE AND PASSIVE SAFETY SYSTEMS

Practical innovation is applied to the all-new 2005 Jeep® Grand Cherokee through integrated safety and security features designed in from the beginning.

Systems such as Electronic Limited Slip Differentials and available Electronic Stability Program (ESP) contribute to the Grand Cherokee’s exceptional vehicle dynamics. Advanced multistage front and available side curtain air bags, tire pressure monitoring system, ParkSense™ (rear park assist), UConnect™ hands-free communications, REC navigation system and all-new SmartBeam® headlamps offer the latest innovation in occupant protection, safety and security on the road.

"Applying the latest available technology to protect occupants is of utmost importance to the Chrysler Group," said Craig Love, Vice President – Rear Wheel Drive Product Team and Core Team Leader. "By integrating safety and security technologies during the design phase, we’re able to offer our customers the tools to avoid collisions as well as protection in the event of a collision."

Chrysler Group’s vehicle development engineers test beyond current regulations to ensure optimum performance and to improve vehicle safety. They evaluated the Jeep Grand Cherokee with tests beyond current government mandates, such as 40 mph front offset and 50 mph rear impact tests. The 40 mph front impact simulates a high-speed vehicle-to-vehicle crash. The 50 mph offset rear-impact test evaluates fuel system integrity when a vehicle is hit from behind on the side nearest the fuel filler tube at high speeds.

In addition, Chrysler Group engineers used pole tests to evaluate occupant protection and concentrated side loading. These tests mimic accidents with narrow objects, such as hitting a telephone pole or tree, to evaluate the side-air bag sensing system. Crash examples may be severe because the crash forces are concentrated in a relatively small area of the vehicle.

Crash Protection Features
The 1993 Jeep Grand Cherokee was the first sport-utility vehicle to be equipped with a driver’s side air bag. The Jeep Grand Cherokee continues to be equipped with the latest technology, like advanced multistage air bags with an occupant classification system (OCS) for the front passenger occupant. This system classifies the severity of an impact event and uses additional sensor information to further modify passenger air bag output for smaller occupants. The resulting deployment could be low, medium or high output, or – in certain instances – none at all. However, even with this advanced system designed to meet government requirements, all occupants are advised to always sit properly in their seat with the seat belt fastened. Children 12 and under should always be in a back seat correctly using an infant or child restraint system or the seat belt positioned correctly for the child’s age and weight.

State-of-the-art energy management features in the body structure and chassis work in conjunction with air bag and seatbelt systems. Front seat belts are equipped with belt pretensioners and constant force retractors. Pretensioners tighten the seat belt to help keep the occupant in place while constant force retractors balance the load on the upper body, reducing injuries from excessive seat belt forces. Head restraints are standard in every seating position. The driver’s side is also equipped with BeltAlert® – an enhanced seat belt reminder system that periodically activates a chime and illuminates a light in the instrument cluster to remind the driver to buckle up.

Crash Avoidance Features
To optimize overall driving performance, the Jeep Grand Cherokee offers ESP. This helps the driver maintain directional stability on dry pavement, in rain, snow or on ice. The Anti-Lock Brake System (ABS) is equipped with electronic sensors that help to prevent wheel lockup, and provide excellent stability and steerability during braking on virtually every type of road surface. ParkSense™ – rear park assist – helps the driver detect stationary objects while the vehicle is moving in reverse.

Tire pressure monitoring (TPM) is standard on all Jeep Grand Cherokees. The system includes pressure sensor modules that are integrated with the valve stems of all four road wheels as well as the spare tire. Each module sends continuous radio frequency signals to a receiver and informs occupants when the pressure is too low. The TPM system displays tire pressure through the Electronic Vehicle Information Center.
 
Jeep Grand Cherokee Multi-Displacement System

Auburn Hills, MI - The 2005 Chrysler 300C and Dodge Magnum RT are the first modern, high-volume production vehicles in North American to feature fully-functioning cylinder deactivation. The Multi-Displacement System (MDS) will be standard equipment with the 5.7-liter HEMI® engine.

"The Chrysler Group MDS seamlessly alternates between smooth, high fuel economy four-cylinder mode when less power is needed, and V-8 mode when more power from the 5.7L HEMI engine is in demand," said Eric Ridenour, Executive Vice President Product Development, Chrysler Group. "This optimizes fuel economy when V-8 power is not needed, without sacrificing vehicle performance—2005 Chrysler 300C and Dodge Magnum RT owners will get the maximum benefit without any compromises."

The HEMI-powered 2005 Jeep Grand Cherokee will also come equipped with MDS as standard equipment. Owners of the Chrysler 300, Dodge Magnum and Jeep Grand Cherokee will receive the powerful benefit of the HEMI engine with the fuel economy that they would only expect from a smaller, less powerful engine. "The MDS was part of the engine's original design," said Bob Lee, Vice President Powertrain Product Team, Chrysler Group. "This resulted in a cylinder-deactivation system that is elegantly simple and completely integrated into the engine design. The benefits are fewer parts, maximum reliability and lower cost."

Some of the significant technologies enabling the Chrysler Group MDS are the speed of electronic controls, the sophistication of the algorithms controlling the systems and the use of Electronic Throttle Control. The HEMI can transition from eight cylinders to four in 40 milliseconds (0.040 seconds).

The HEMI engine with MDS has completed over 6.5 million customer-equivalent miles through Chrysler Group's development and durability testing. It is covered by the 7-Year/70,000-mile Limited Powertrain warranty.

The system deactivates the valve lifters. This keeps the valves in four cylinders closed, and there is no combustion. In addition to stopping combustion, energy is not lost by pumping air through these cylinders.

Customers will experience estimated fuel economy gains of up to 20 percent under various driving conditions, and a projected 10 percent aggregate improvement. Improved fuel economy is realized without any change in customer experience—drivers will receive the benefit without changing their driving habits and without compromising style, comfort or convenience.
hemi.jpg
 
Link:

CanadianDriver.com First Drive of '05 JGC

First Drive:
2005 Jeep Grand Cherokee
review and photos by Greg Wilson

Santa Barbara, California – Lets be honest for a minute. Despite the 2004 Jeep Grand Cherokee’s capable on and off-road performance, its chief asset is its strong styling. Look at the GMC Envoy, Chevy Trailblazer and Ford Explorer – not exactly an exciting bunch of 4X4s. The 2004 Grand Cherokee is the sexiest mid-size SUV under $50,000, and that’s why they sell so many of them, in my opinion. Which makes me wonder why DaimlerChrysler would deliberately tone down the styling of the new 2005 Grand Cherokee.

The styling changes aren’t major, but they make the 2005 Grand Cherokee a little more ordinary. The hood is flatter and the nose blunter, despite the sculpted hood lines and round headlamps. The side windows are smaller because the ‘beltline’ has been raised. The lower side panels, which used to pinch in under the body, are now more slab-sided, ostensibly to prevent stone chips – this is noticeable from the rear where it looks squarer. The front and rear wrap-under panels are now more
upright and there’s a new (removeable) front spoiler. These changes aren’t enough to make the 2005 Grand Cherokee unrecognizable – the bold 7-slot front grille is still front and centre – but there’s something less distinctive about the 2005 Grand Cherokee. During the day that I drove it around the Santa Barbara, California area, few observers gave it a second look - not something I expected in a redesigned vehicle that’s not even on the market yet.

Styling aside, I can report that just about everything else about the 2005 Grand Cherokee has been improved, particularly its handling and ride. The 2005 model is no bigger than the previous model – apparently Grand Cherokee owners were surveyed, and they said they liked the size – but it’s got more features, better front and rear suspensions, a wider track, longer wheelbase, a new rack and pinion steering system, and improved 4WD systems. The base 195 horsepower 4.0 litre inline six cylinder engine has been replaced by a 210 horsepower 3.7 litre V6, and the Grand Cherokee is now available with the 330 horsepower 5.7 litre Hemi V8 engine giving it best-in-class horsepower, torque and towing capacity of up to 7200 lb. This engine features Chrysler’s cylinder de-activation system which allows it to run on four cylinders when full power is not required improving fuel economy by up to 20%. Indeed, the fuel consumption readout on the 5.7 litre Grand Cherokee’s onboard driver information centre indicated average fuel consumption of 15.5 mpg (U.S.) compared to 14.2 mpg (U.S.) for the Grand Cherokee with the 4.7 litre V8.

The previous Grand Cherokee’s solid beam front axle has been replaced by an independent short and long arm front suspension which does wonders for its steering, ride and handling. DaimlerChrysler Marketing VP, Ron Smith, said the company wanted to refine the Grand Cherokee’s on-road performance while maintaining its off-road abilities - and that they did. The 2005 Grand Cherokee is a surprisingly comfortable, quiet and easy-to-drive vehicle on the freeway, around town, or out on a twisty highway. On bumpy roads, there is more suspension travel and less ‘head toss’. And though the new variable ratio rack and pinion steering lacks feel, it is quite precise and easy to steer. Later in the year, Jeep will introduce a new Dynamic Handling System that includes a new hydraulically controlled stabilizer bar to improve the ride further.

Over the course of a day, I drove Grand Cherokees with all three available engines. I didn’t get a chance to do any official timing, but I would rate the V6 ‘slow but smooth’, the 4.7 litre V8 ‘adequate’, and the 5.7 litre V8 Hemi ‘quick and sporty’. Remember, Grand Cherokees weigh 4200-4700 pounds, so there’s a lot of bulk to pull, even though it is unit body construction. I found the 5-speed automatic transmission performed flawlessly, and its new manual operation provided sportierperformance in slow, twisty backroads, and allowed a choice of lower gears when travelling off-road. The 5-speed automatic transmission is available with all three engines.

On Jeep’s tortuous off-road course, I found the new Grand Cherokee wonderfully competent on trails that would leave other 4X4s struggling to get through. The standard Quadra Trac 1 transfer case is a full-time, hands-off system that splits front to rear torque 48/52. Grand Cherokees with Quadra Trac 1 also include a standard traction control system that brakes any wheel that is slipping to allow power to be transferred to the other wheels. A mid-level Quadra Trac 2 system includes a Low Range gear as well as traction control. And top-of-the-line Quadra Drive 2 features Low Range and front and rear electronic limited slip differentials.
 
Page 2

I drove a Grand Cherokee with the 4.7 litre V8 engine and Quadra Trac 2 system through the off-road course, and it had no problem climbing steep, slippery grades, negotiating steep declines, and straddling creek beds and uneven outroppings. The Quadra Trac 2 system allows individual wheels to slip when accelerating, but the traction control system brings them under control in half a second. Even in loose sand on a steep uphill grade, my Grand Cherokee was able to find traction. The Quadra Drive 2 system, with its limited slip differentials, offers even more traction and less wheelspin than Quadra Trac 2 – but both systems are excellent in really bad off-road conditions. I would recommend Quadra Trac 2 over Quadra Trac 1 because the latter doesn’t have a Low Range gear.

The new Grand Cherokee has a unique method of engaging Low Range. After putting the shifter in Neutral, the driver pulls up on a chrome lever in the centre console, holds it up for three seconds, and lets it go. The same method is used to disengage Low Range.

The Grand Cherokee is available with 2WD in the United States, but in Canada all Grand Cherokees are 4WD – or more correctly, AWD.

In Canada, all Grand Cherokees include standard Electronic Stability Control which automatically corrects the direction of travel if the vehicle begins to understeer or oversteer. As well, it includes anti-rollover sensors which attempt to avert a rollover if the vehicle leans over too far when cornering.

The redesigned interior of the new Grand Cherokee is about the same size, and there’s adequate headroom and legroom for four adults. The interior features a new four-gauge instrument cluster with metal trim, a new gated automatic transmission shift lever, and a simple centre control console. I wasn’t overly impressed with the quality of the dash materials for a vehicle in this price range, but the controls are easy to use. The split folding rear seatbacks now have rear head restraints that fold down automatically when lowered, saving you the trouble of removing and storing them.

Safety advances include multi-stage front airbags and passenger seat detector, new curtain airbags, a tire pressure monitoring system, rear park sensors, and new SmartBeam headlamps which automatically vary the intensity of the lighting depending on whether another vehicle is coming in the opposite direction.

The cargo area has a new under-floor storage compartment, and a handy waterproof, plastic storage tray - but as before, the loading height is quite high and the area below the sliding privacy cover is smaller than you’ll find in a typical mid-size sedan trunk. On the plus side, the spare tire has been moved under the floor.

The rear hatch lifts up from floor height revealing a wide, easy to access cargo opening. As well, the rear hatch has a separate opening glass window.

2005 Grand Cherokee Laredo models ($38,990) come with standard 3.7 litre V6 engine, 5-speed automatic transmission, Quadra Trac 1 AWD, traction control, 17 inch tires and wheels, four wheel disc brakes with ABS and ESP, 8-way power driver’s seat, lumbar adjuster, mini trip computer, and tire pressure monitoring system. Options include the 4.7 litre V8, leather seats, moonroof, curtain airbags, navigation system, 6-disc CD changer, off-road package with tow hooks and skid plates, and new rear DVD entertainment system.

2005 Grand Cherokee Limited models ($48,595) include a standard 4.7 litre V8, 5-speed automatic transmission, Quadra Trac 2, two-tone leather seats with heaters, power moonroof, dual zone automatic climate control, power adjustable pedals, 4 way power passenger seat, 288 watt premium sound system with 6-disc in dash CD player, woodgrain trim and chrome accents.

Of note: the price of the base model has dropped almost a thousand dollars even though it has more standard equipment. Canadian MSRPs are as follows: Laredo 4X4 3.7 litre V6 $38,990; Laredo 4X4 4.7 litre V8 $42,030; Limited 4X4 4.7 litre V8 $48,595; Limited 4X4 5.7 litre V8 Hemi $49,990.

The basic warranty on the Grand Cherokee is 3 yrs/60,000 km, while the powertrain warranty is 5 yrs/100,000 km (not 7 yrs/115,000 km).

Grand Cherokees will arrive in dealerships this Fall.
 
2005 Jeep Grand Cherokee
Will it remain the one to beat?
by Paul A. Eisenstein (2004-09-01)

How do you prove you've really got a breakthrough product? That's the challenge Jeep faced back in 1992, when it launched the all-new Grand Cherokee. So, rather than simply lifting the covers at the annual North American International Auto Show, then-Chrysler President Bob Lutz drove a Jeep up the steep stone steps of Detroit 's Cobo Hall, and right through a plate glass window.

It was an audacious debut - and a fitting one, for the original Grand Cherokee was visually striking and sophisticated, surprisingly well-mannered on the highway, and yet confidently capable off-road, as well. Perhaps no product did more to ignite the so-called crossover boom, as Americans raced to trade in their passenger cars for SUVs and other light trucks.

Jeep has certainly benefited from this boom, yet it can be argued that in recent years, the Grand Cherokee has slipped a bit to the side of the mainstream. These days, sport-utility buyers seem increasingly divided into two camps: those who want traditional utes with three-row, minivan-like seating, and others looking for the even more car-like ride and handling of so-called crossover SUVs. So there was plenty of interest in seeing what DaimlerChrysler would come up with when it unveiled the third-generation Grand Cherokee earlier this year.

Evolution in time

The Jeep just getting ready to hit the road can best be described as an evolutionary, rather than revolutionary, update. There's a good chance that you might walk right by one in the parking lot and not even realize it's the 2005 redesign. There's the traditional, seven-slot Jeep grille, of course, and the basic silhouette is very much that of a Grand Cherokee.

Yet a closer inspection reveals some notable differences from the '04 model, starting with the rounded headlights borrowed from the popular Jeep Liberty. The latest incarnation of Jeep's flagship SUV is a big longer, a slight bit wider, and a bit more boxy than the vehicle it replaces. The rear glass has been squared off and is much more upright than with the second-generation Grand Cherokee. The practical purpose is to provide easier access to additional cargo space. The wheel openings are now a trapezoidal design. And there's more chrome, but the use of the additional brightwork is quite classy.

The hood is longer, noted designer John Sgalia, "to project the power we have in the HEMI engine." The wildly popular, 5.7-liter V-8 is, in fact, one of three engines available for the '05 Grand Cherokee, along with a 4.7-liter V-8 and a 3.7-liter V-6. And sources tell TheCarConnection that the new 6.1-liter version of the HEMI, making around 425 hp, will be added as an option in the 2006 model year.

Design on a (para)digm

But we're getting ahead of ourselves. The original, 1993 Grand Cherokee boasted an unexpectedly refined design, both inside and out, its interior as sophisticated as any vehicle in its price class. In keeping with overall market trends, the new Jeep's cabin is more refined, though the various gray and black plastics are still not world-class. The instrument panel has been organized into a sort of double cockpit, with gauges well-placed before the driver, and climate and audio controls within easy reach on the center stack. In general, Jeep engineers have given some well-deserved attention to the tactile qualities of the Grand Cherokee's switches and knobs. They just feel better.

There's an optional, new navigation system with a positively massive LCD display, and for rear seat passengers, a large, roof-mounted monitor for whiling away the miles watching DVDs.

Perhaps the biggest initial surprise was Jeep's decision not to add a third row of seats, in line with one of the SUV market's biggest trends. But it was felt that would have required compromises in the ute's off-roadability. So those who need the extra seating will have to wait a while for the arrival of the all-new, three-row Jeep Commander.

The '05 Grand Cherokee's seats have been re-engineered. Up front, they're more comfortable and better looking, with their handsome two-tone trim. The rear seats have been given an extra two inches of travel. We wish we could say that's enough. It's not, though, and the back seats are the source of our biggest complaint about the new Jeep. The floor is so high that even average-sized passengers will find their thighs off the seat and knees in their face. Overall, that high floor limits headroom, so even though the interior is bigger, one can come away feeling a bit claustrophobic.

Let's get a few other complaints out of the way: in keeping with the low, almost hotrod-like look pioneered by the Chrysler 300, the windshield of the new Grand Cherokee is lower and more steeply raked, forcing you to crane a bit to see some stoplights. We were pleased that Jeep integrated adjustable pedals into the new SUV, but not at the expense of a telescoping steering wheel. At least it does tilt.

A point of debate was Jeep's decision to make the new head-curtain airbag system an option, rather than following Honda's lead and offering up as standard equipment. Expect at least 30 percent of Grand Cherokee buyers to cough up the cash - and it's an expensive system. We wouldn't be surprised if competitive pressures quickly force Jeep to make it standard, as well.

Safe and sound

Overall, engineers have paid a lot of attention to the subject of safety. The '05 has been tested beyond the minimum government specifications, the automaker boasts, handily surviving 40-mph front offset and 50-mph rear crash tests. There are plenty of car-like features, such as stability control and Jeep's new Dynamic Handling System, though again, many of them are high-cost options.

DHS is a hydraulically-controlled active stabilization system, designed to reduce body roll in tight maneuvers. The system will debut late in the model-year, and will be available, at least initially, on the HEMI model only.

With the new system, the HEMI comes as close as you could hope for to car-like handling. Even without DHS, we were impressed with the ride of the various versions of the Grand Cherokee that we tested during a day's jaunt through the mountains east of Santa Barbara. On reasonably smooth pavement, you definitely get the sport in this sport-utility vehicle, though the ride can get a bit bouncy, especially on the sort of whoop-de-doo freeway pavement common across California.

Steering is precise and there's a solid, on-center feel, which overcomes one of the most common complaints about the last-generation Grand Cherokee.

Leave it to Jeep to come up with three new four-wheel-drive systems. The typical buyer is likely to opt for the full-time Quadra-Trac I package. For those who tow or do serious off-roading, there are the Quadra-Trac II and Quadra-Drive systems.

We didn't get to spend much time off-road in the new Jeep, but the brief course we followed would have fairly tested the mettle of anything on the road. Yet the new Grand Cherokee with Quadra-Trac II made it all easy going. Even on the loosest dirt and most humbling rock, our ute never seemed to lose its grip. And the HEMI V-8 powered over the steepest hills.

If recent experience is any indication, we'll expect a high "take rate" for the hip HEMI package. It's certainly a lot of fun to drive. Stomp down on the accelerator and the engine emits a menacing roar as it launches down the road. But for those on a budget, the reality is that the 4.7-liter V-8 nearly matches its bigger cousin off the line, and it's likely to beat the meager 12 mpg colleague and TCC Editor Marty Padgett logged during a day in the HEMI model.

There are going to be those disappointed by the new Grand Cherokee - those who might have expected Jeep to acknowledge the increasingly popular crossover side of the SUV segment, as well as those who would prefer still more seating. But the upcoming Jeep Commander will be there for those who need a seven-seater, and as TheCarConnection recently reported, Jeep is developing a lower-cost "soft-roader," too.

There are lots of others who will be pleased to see that Jeep has stayed true to its roots. And there's no question that the 2005 Grand Cherokee is even more capable than ever - both on-road and off. It may not grab your attention the way the original did. But it doesn't have to smash through windows to prove that it can still set a benchmark for go-anywhere SUVs.
8320_image.jpg
 
Link:

Edmunds First Drive of '05 JGC

The Bottom Line: The new Grand Cherokee manages to retain unparalleled off-road ability while garnering new levels of luxury never before seen in a Jeep. Excellent engine options and a well-thought-out interior also score major points.
 
Link:

Edmunds Full Test of '05 JGC

VEHICLE TESTED

2005 Jeep Grand Cherokee Limited 4WD 4dr SUV (4.7L 8cyl 5A)
(vehicle detail)

Ups: Nimble handling on pavement, hard-core off-road capability, loads of torque from Hemi V8, simple controls.

Downs: Low-quality interior materials, small backseat, poor gas mileage even with multidisplacement system, ride can be bouncy over ruts.

The Bottom Line: A joy to drive both on pavement and dirt trails, but downmarket furnishings and cramped rear seating make it a tough sell over the Toyota 4Runner.
 
Amazing that the top contender for offroad capability that comes with a 5.7 V8, comes standard with 29" tires and 29.4" tires as an option???
 
I had a '96 and a '99 JGC, both of which were good vehicles, except for the infamous Jeep reliability issues, which I experienced in both vehicles. Hence the reason for buying my 2004 T4R SE, which is a significantly better vehicle in many aspects.

As for the 2005 JGC, I think they were going for the "can we possibly make this any f-uglier?!?" look....
 
bulldog-yota said:
Amazing that the top contender for offroad capability that comes with a 5.7 V8, comes standard with 29" tires and 29.4" tires as an option???

it almost looks like a Chevy Trailblazer in this pic…

05grandcherokee_5.jpg
 

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