02-28-2021, 12:31 PM
|
#1
|
Member
|
|
Join Date: Aug 2020
Location: Earth
Posts: 295
|
|
Member
Join Date: Aug 2020
Location: Earth
Posts: 295
|
Toyota's shift logic engineer should be shot
We've owned our 2020 ORP since July. Yesterday we drove 200 miles to Wichita which was through a constant 20mph+ headwind and lots of very long and steep hills through the Flint Hills of south central Kansas. The 4runner was constantly bouncing between 5th and 4th. Then when you'd get past the grade, it took forever to upshift to 5th. I could remedy this with a simple tap of the accelerator to force the upshift. The truck only managed 16mpg too. LOL Towards the end of trip I learned the key was to keep it under 78mph and when in cruise control, give it a little throttle myself going up hills to unlock the torque converter in 5th gear to keep it from downshifting to 4th.
Whoever at Toyota did the shift logic should be shot. It is seriously bad in those situations. There is no need for a downshift into 4th. Simply unlocking the torque converter in 5th is enough for those types of grades. It's as if the trans ecu doesn't recognize that 5th gear torque converter unlock is an option. I tried also using the manual mode function with it in 5th but it didn't help.
For those that have throttle enhancers like the Sprint Booster, does your 4runner exhibit this annoying behavior?
|
|
Reply With Quote
|
02-28-2021, 12:49 PM
|
#2
|
Senior Member
|
|
Join Date: Sep 2020
Location: Utah
Posts: 1,317
|
|
Senior Member
Join Date: Sep 2020
Location: Utah
Posts: 1,317
|
Let's see: you are driving a box at 80 MPH with a 20+ MPH head wind (100+ MPH wind speed), uphill, and you complain about getting "only" 16 MPG?
|
|
Reply With Quote
|
02-28-2021, 12:59 PM
|
#3
|
Member
|
|
Join Date: Apr 2020
Location: South Carolina
Posts: 183
|
|
Member
Join Date: Apr 2020
Location: South Carolina
Posts: 183
|
Quote:
Originally Posted by fkheath
Let's see: you are driving a box at 80 MPH with a 20+ MPH head wind (100+ MPH wind speed), uphill, and you complain about getting "only" 16 MPG?
|
I don't think his issue was really with the MPG.
|
|
Reply With Quote
|
02-28-2021, 01:23 PM
|
#4
|
|
Senior Member
|
|
Join Date: Dec 2015
Location: Knoxville, Tennessee
Posts: 1,256
Real Name: Mark
|
|
Senior Member
Join Date: Dec 2015
Location: Knoxville, Tennessee
Posts: 1,256
Real Name: Mark
|
It is pretty bad. I never had the 5-4-5-4-5-4-5-4-5 shifting in my '10 TE nor did it ever seem to get hung up in 4th. The '20 ORP on the other hand does these things quite often forcing me to manually put it in 4th until I get past the grade. It's kind of dumb.
__________________
Current: 2004 Land Cruiser Thundercloud Metallic
Former: 2020 ORP Silver. BFG AT KO2s, TRD Skid Plate, added Rear Sliding Deck, Pro LED fogs, Infinity REF-3032CFX dash speakers.
In Between: 2020 Jeep Wrangler Unlimited Rubicon with almost all options. Got tired of worrying about it disintegrating and ending up setting at the dealer for weeks and months.
Former: 2010 TE Silver w/ C4 Fab Rock Sliders, TRD skid plate, ECGS bushing upgrade, Bilstein 5100s, and BFG AT KO2 tires.
|
|
Reply With Quote
|
02-28-2021, 01:25 PM
|
#5
|
Member
|
|
Join Date: Oct 2019
Location: Las Vegas
Posts: 831
|
|
Member
Join Date: Oct 2019
Location: Las Vegas
Posts: 831
|
Yeah, that's an accurate observation vis a vis the 4th gear 5th gear battle. I see it a lot when I'm using the radar cruise on the freeway and you hit a slight grade...it's quick to downshift and then sticks there. A tap of the throttle brings it back to 5th gear. It's annoying for sure on my 30 minute commute, I'm sure it doesn't get more pleasant over time on a longer drive.
__________________
'20 Army Green 4Runner TRD PRO
'16 Quicksand Tundra TRD PRO Gone
'08 Salsa Red Pearl 4x4Runner SE V6: Gone
|
|
Reply With Quote
|
02-28-2021, 01:34 PM
|
#6
|
|
Senior Member
|
|
Join Date: Aug 2017
Location: Dallas, TX
Posts: 1,509
|
|
Senior Member
Join Date: Aug 2017
Location: Dallas, TX
Posts: 1,509
|
They should have put the GX460 6 speed tranny in the 4Runner and geared it with 4.56. I've gotten as low as 13 mpg against a wind, pretty much stays in 4th. But I have a lift and bigger tires.
__________________
2017 Off-road Premium w KDSS, moon roof, sliding rear cargo deck,3" Toytech Boss lift, SPC upper control arms, Sonoran Steel High Articulation KDSS Trac/PanHard Bar, RCI sliders, RCI skid plates aluminum including gas tank, C4 Fab diff skid plate, SCS Ray 10 Wheels Matte Gray, 285/70R17 Hankook Dynapro AT2 RF11 E-load RWL, Cali Raised LED 3x2 fog-light pods, Lock'r Down EXxtreme console safe with electronic lock, Auto Heat Shield all windows, Raingler rear cargo net, Canvasback rear covers, LFD Off-Road cross bars aluminum, LFD Hybrid bumper, LFD wind fairing, LFD Hi-lift jack mounts, Goat Armor, Blackgate Custom KDSS spacers, Ironman 2.5 awning with quick release mounts, Ironman 12,000 lb synthetic line winch.
|
|
Reply With Quote
|
02-28-2021, 01:36 PM
|
#7
|
Member
|
|
Join Date: Apr 2013
Location: South of Denver
Posts: 497
Real Name: Mike
|
|
Member
Join Date: Apr 2013
Location: South of Denver
Posts: 497
Real Name: Mike
|
My '15 does the same and requires babysitting as OP said. Most posts I have seen about the FJ indicate it exhibits similar behaviour.
Since shifting causes lots of wear, I just put mine in S4 and wait for the top of the hill.
I hear that installing the supercharger gets rid of this issue.
Some sort of aftermarket programming change may work as well, but I am planning on staying stock so haven't explored that option.
__________________
Between outfits.
|
|
Reply With Quote
|
02-28-2021, 01:37 PM
|
#8
|
Member
|
|
Join Date: Dec 2020
Location: Colorado
Posts: 131
|
|
Member
Join Date: Dec 2020
Location: Colorado
Posts: 131
|
I drive my 2021 from 5,280 feet over 11,000 foot passes weekly to go skiing, and my shift logic seems just fine. I read these complaints about the 5th gen power train all the time, and it feels like people are describing a totally different vehicle.
Sent from my iPhone using Tapatalk
__________________
2021 4Runner TRD Pro (Lunar Rock)
|
|
Reply With Quote
|
02-28-2021, 01:38 PM
|
#9
|
Member
|
|
Join Date: Mar 2010
Location: Austin, TX
Posts: 395
|
|
Member
Join Date: Mar 2010
Location: Austin, TX
Posts: 395
|
Just shift manually...additionally, I'd love to get 16 mpg, I've had a 5th Gen since 2009 and never averaged more than 15, usually more like 14-14.5
|
|
Reply With Quote
|
02-28-2021, 02:09 PM
|
#10
|
|
Senior Member
|
|
Join Date: Mar 2010
Location: denver
Posts: 3,010
|
|
Senior Member
Join Date: Mar 2010
Location: denver
Posts: 3,010
|
I drive mountain roads all the time and I like the shift points. locking and unlocking torque converter creates heat which reduces Tranny life so staying in 4 is like driving a stick. Also going down grades in lower gear keeps the speed in check and lessen the chance of brakes overheating.
|
|
Reply With Quote
|
02-28-2021, 02:12 PM
|
#11
|
Member
|
|
Join Date: Aug 2018
Location: PDX
Posts: 33
|
|
Member
Join Date: Aug 2018
Location: PDX
Posts: 33
|
Honestly thought this was a troll post when OP said steep hills in Kansas.
|
|
Reply With Quote
|
02-28-2021, 02:53 PM
|
#12
|
|
Member
|
|
Join Date: Jun 2017
Location: South MS
Posts: 103
Real Name: Jared
|
|
Member
Join Date: Jun 2017
Location: South MS
Posts: 103
Real Name: Jared
|
Pulling an empty 5x8 trailer, I have spent nearly 1/3 the distance crossing Texas in 4th gear on the interstate just to keep the 4R from gear searching.
__________________
*'16 Trail - JBA UCAs, Toytec BL, Dobinsons FR, Radflo LT Rear, (~3.5F/4R total lift) 285/70 (/75s next), mix of HeftyFab/SSO steel goodies
|
|
Reply With Quote
|
02-28-2021, 03:03 PM
|
#13
|
|
Senior Member
|
|
Join Date: Jan 2013
Location: OC, Derpifornia
Age: 39
Posts: 1,243
|
|
Senior Member
Join Date: Jan 2013
Location: OC, Derpifornia
Age: 39
Posts: 1,243
|
Paul K,
If it's gear hunting, downshift. Use that S mode that everyone thinks is a sport mode but isn't. It's an anemic V6 that groans when you ask for any kind of power.
The 3.5 in the turd gen Tacoma is worse so be thankful it isn't that engine.
__________________
2019 Runner TRD Offroad Premium w/KDSS
Last edited by Whippersnapper02; 02-28-2021 at 06:32 PM.
|
|
Reply With Quote
|
02-28-2021, 05:26 PM
|
#14
|
|
Member
|
|
Join Date: Jan 2015
Posts: 297
|
|
Member
Join Date: Jan 2015
Posts: 297
|
Quote:
Originally Posted by Charles Bronson
We've owned our 2020 ORP since July. Yesterday we drove 200 miles to Wichita which was through a constant 20mph+ headwind and lots of very long and steep hills through the Flint Hills of south central Kansas. The 4runner was constantly bouncing between 5th and 4th. Then when you'd get past the grade, it took forever to upshift to 5th. I could remedy this with a simple tap of the accelerator to force the upshift. The truck only managed 16mpg too. LOL Towards the end of trip I learned the key was to keep it under 78mph and when in cruise control, give it a little throttle myself going up hills to unlock the torque converter in 5th gear to keep it from downshifting to 4th.
Whoever at Toyota did the shift logic should be shot. It is seriously bad in those situations. There is no need for a downshift into 4th. Simply unlocking the torque converter in 5th is enough for those types of grades. It's as if the trans ecu doesn't recognize that 5th gear torque converter unlock is an option. I tried also using the manual mode function with it in 5th but it didn't help.
For those that have throttle enhancers like the Sprint Booster, does your 4runner exhibit this annoying behavior?
|
I find the Sprint Booster will down shift earlier, but then wont up shift and will hang in that lower gear, at higher RPMS. Even when it feels like has achieved enough speed to up-shift, it wont.
I kept my SB push button changer mounted on dash so, when I hit the highway I turn it off, if I know I am headed over the mtns.
|
|
Reply With Quote
|
02-28-2021, 06:21 PM
|
#15
|
|
Member
|
|
Join Date: Feb 2021
Location: Michigan
Posts: 34
|
|
Member
Join Date: Feb 2021
Location: Michigan
Posts: 34
|
Is what it is. Put yer foot in it. Actually DRIVE your vehicle....vs....wanting the OEM to program it so it feels 'nice' to you. YMMV, of course.
__________________
2021 TRD Pro
|
|
Reply With Quote
|
Thread Tools |
|
Display Modes |
Rate This Thread |
Linear Mode
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is On
|
|
|
|