Will_4R

A frozen waterfall collapsed into big chuncks of solid ice accross the road. Good thing was driving a 4th gen.



ATRAC in action



just to clarify: this is along an established trail/road for motorized vehicles (all laws and tread lightly ethics were followed).

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2003, Sport, V6, 4WD, 32" ATs

Coles05t4r

Nice videos man! Looks like a pretty good trail you were on. Are those stock tires?

Will_4R

Ya a stock tire, Michelin Cross Terrains.

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2003, Sport, V6, 4WD, 32" ATs

CJ3Flyr

Great videos! They totally highlight how capable the ATRAC makes these 4Runners, even when they're wearing very tame tires.

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Chris
07 Salsa SR5, 4wd Cyclone pre-cleaner , Aux Transmission Cooler, Hidden Hitch 70779 (600/6000lbs, WDH=730/7300lbs), AirLift 1000, FJCruiser front springs (& now rear too!), Axle Vent Mod, Swaybar Bushing Upgrade, V6 Tick Reduction, VSC off mod, Maplight Mod, 255/75/17 Goodyear Wrangler SAs, Tailpipe Mod

Maz

Hear, hear great video! Now dumb question time. Can anyone give a quick tutorial on how the ATRAC was in play and so capable here? I've read many of the threads on the ATRAC subject, but unfortunately it doesn't feel like the light bulb has turned on yet.

CJ3Flyr

Read the links here, look at the first two under the bold "Off-roading info". 4Runner FAQ - everything you always wanted to know about T4R (but were afraid to ask)

The short answer is ATRAC uses the ABS braking system to provide "limited-slip like" performance. When using a gentle, smooth power application the T4R does a great job of sending the power to the wheel with traction. Essentially it's truly 4wd. Old school, open diff 4wd's could get stuck if one side of the vehicle was on ice and the other side was on dry pavement. Limited-slip or locking Front and/or Rear differentials remedy this. ATRAC is a high tech iteration of limited-slip.

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Chris
07 Salsa SR5, 4wd Cyclone pre-cleaner , Aux Transmission Cooler, Hidden Hitch 70779 (600/6000lbs, WDH=730/7300lbs), AirLift 1000, FJCruiser front springs (& now rear too!), Axle Vent Mod, Swaybar Bushing Upgrade, V6 Tick Reduction, VSC off mod, Maplight Mod, 255/75/17 Goodyear Wrangler SAs, Tailpipe Mod

woodyc

Nice Drivin Will 4R !!

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06 Sport, V6, Sway Away Coilovers front, Bilstiens w/Sway Away Coils rear, BFG A/T KOs 275/65/17s.

SkylineGTRracer

Awesome videos! the truck doesn't even look like its working hard at all

12guns

Very cool, I just got back from a cabin of mine in North Arkansas. Coming out w/ a 4wheeler on a trailer and a full load in the back, my 05' didn't miss a beat. On the steep, wet, muddy hill, I went slow and steady and the atrac did it's thing. I would have been spinning my 32" mud tire on my old tacoma to get up the same hill! Love my Runner, great vids!

bste3

this may be a noob comment but why were you aiming left in the mud video? if you pointed straight you would have followed the exact same track but faster

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-DLG, '06 T4R SR5 4x4 v6

MikeRiela

when you are in deep mud rutted trails with a stock or non mud tire and you become stuck, you have to turn the wheel left and right to gain traction. if he kept the tires straight he would have dug himself in.

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Mike 06 SE 4x4 V6 Build Thread
275/70/17 MT/R with Kevlar, OME N140s with 886 and 3/4" spacer. n74L with 1" spacer, Custom LT Man-A-Fre Coils, Spidertrax, Medic Links, Rear Diff Breather, VSC off, XDI CAI, Rack with 3 6" Procomp 135w, PIAA 520s, Silverstar fogs, Prestige Remote Start, Cut Resonator, 12v Mod, 6000k HID, Scion T1806 with DICE Ipod unit, Smoker Package, Uniden CB, Firestik.

Maz

Thank you flyer...I think reading the threads was trying to take in too much info, and ending up on overload. You're synopsis boils it down to the basics.

bste3

ah okay! see i wouldnt have ever thought of that.

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-DLG, '06 T4R SR5 4x4 v6

Will_4R

ATRAC: One tires spins one or two revolutions, the computer senses the slip, applies the brake to the slipping wheel, tricking the differential to send power to the wheel with traction, and forward I go. I need to get the RPMs to about 2000 for ATRAC to kick in. That is why at first I wasn't going anywhere. If you look closely I only have one wheel spinning on each axle. As soon as ATRAC starts working, it works well and keeps working till I am on solid ground.

In the first video, ATRAC was working most of the way as well. There certainly was uneven traction left to right, which would have made that crossing way harder with open diffs and no traction control. If you look closely it looks like hte rear tires with chains on them are doing almost all the work. Not much traction up front.

I know the 4th gen has worse angles and less clearance than previous generations, but the ATRAC more than makes up for it offroad. Although it looks less "offroad truck-like" than older 4Runners it's added strength and power combined with ATRAC makes it a real beast offroad.

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2003, Sport, V6, 4WD, 32" ATs

Autbond

why did you not just turn your wheels straight in that mud?

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2006 4Runner Sport V8 4WD Satoshi Grille, Magnaflow exhaust, K&N filter; Shrockworks bumper, Overland Warehouse 2.0 Radflo full kit, 33 inch Mud Grapplers on 20 inch Rockstars. HID Kit, Blacked out Headlight Housings, Tinted tail lights, LED license plate lights, LED running lights and turnsignals. De-badged all around. 2% tint all around with 30% all the way down windshield. Kenwood Double Din 7 inch headunit. 2 Alpine Type R 12" subs with 2 Alpine 500 watt Mono Amps and a 6 farad capacitor. All interior lights swapped for LED's. Train Horn mounted where spare tire was. WAR EAGLE!