05-28-2023, 01:34 PM
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#16
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Quote:
Originally Posted by thatoneguy
The actuator itself is still electronic even with the manual lever? And the manual lever is clearly connected to something real since it vibrates all the time?
Can someone explain exactly how this works? Is the manual lever truly 100% pointless?
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Nah the lever part itself is manual. There is still an electrical component/actuator in the front end that needs to click in for 4wd to work though.
If the lever meant the whole system was 100% manual, it would be bulletproof and highly preferable, to me at least.
Sent from my SM-S901U using Tapatalk
Last edited by kenwilliams0803; 05-28-2023 at 01:37 PM.
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05-28-2023, 01:50 PM
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#17
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Quote:
Originally Posted by thatoneguy
The actuator itself is still electronic even with the manual lever? And the manual lever is clearly connected to something real since it vibrates all the time?
Can someone explain exactly how this works? Is the manual lever truly 100% pointless?
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The lever (on 4Runners with a lever) goes into the VF2A transfer case, and actually moves the shift fork in the transfer case to engage 4wd, and low-range when 4-lo is engaged. This sends power to the front diff via the driveshaft (or propeller shaft as Toyota refers to it).
However, there is still an electric actuator (the ADD actuator) which engages the front axle to the front differential.
SR5 models use a knob controlling an electric actuator on the transfer case to shift into 4wd hi and 4wd lo. THere is also the ADD actuator engaging the front axle.
Limited models use an electric actuator to shift from full-time 4wd into 4hi locked, and 4lo locked, and back. There is no ADD on the Limited models as the front axle is always being driven.
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05-28-2023, 02:02 PM
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#18
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Quote:
Originally Posted by 02SE
The lever (on 4Runners with a lever) goes into the VF2A transfer case, and actually moves the shift fork in the transfer case to engage 4wd, and low-range when 4-lo is engaged. This sends power to the front diff via the driveshaft (or propeller shaft as Toyota refers to it).
However, there is still an electric actuator (the ADD actuator) which engages the front axle to the front differential.
SR5 models use a knob controlling an electric actuator on the transfer case to shift into 4wd hi and 4wd lo. THere is also the ADD actuator engaging the front axle.
Limited models use an electric actuator to shift from full-time 4wd into 4hi locked, and 4lo locked, and back. There is no ADD on the Limited models as the front axle is always being driven.
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Thanks, this is the information I was looking for.
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05-28-2023, 03:36 PM
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#19
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Join Date: Aug 2016
Location: Ontario Canada
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Quote:
Originally Posted by thatoneguy
The actuator itself is still electronic even with the manual lever? And the manual lever is clearly connected to something real since it vibrates all the time?
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The transfer case is manually activated. The front axle is electronically actuated once the transfer case is engaged manually (4WD icon blinking until the axle is engaged.)
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05-28-2023, 05:03 PM
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#20
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In addition to the 2014 SR5 and the 2023 ORP, I have a 1994 K2500 Suburban 4WD diesel and a 1999 K2500 Suburban 4WD diesel. The ‘94 is manual shift with electronic actuator on the front differential. The ‘99 is push button shift with electronic actuator on the front differential. In addition to 4Hi and 4Lo, the ‘99 has AWD…when it works.
I have had all sorts of problems with the ‘99 of late. New transfer case and transmission last year. It will shift into 4Hi, which I’ve verified on and off pavement, but the light on the button just flashes. Won’t shift into 4Lo or AWD. I have replaced the shift motor on the case, the Transfer Case control module and the shift button assembly. I was going through electrical tests and documenting results before I had to go back into the office in LA (truck is up in Montana). I have since order a used complete set of shop manuals off eBay and that rig will come down here for me to work on it. Just no fun doing electrical in freezing weather.
I just rebuilt an NP 241-C transfer case and used it to replace the leaking one in the ‘94. Not too hard of a job:
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05-28-2023, 07:30 PM
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#21
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Join Date: Oct 2022
Location: Upstate NY
Posts: 107
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Quote:
Originally Posted by 02SE
The lever (on 4Runners with a lever) goes into the VF2A transfer case, and actually moves the shift fork in the transfer case to engage 4wd, and low-range when 4-lo is engaged. This sends power to the front diff via the driveshaft (or propeller shaft as Toyota refers to it).
However, there is still an electric actuator (the ADD actuator) which engages the front axle to the front differential.
SR5 models use a knob controlling an electric actuator on the transfer case to shift into 4wd hi and 4wd lo. THere is also the ADD actuator engaging the front axle.
Limited models use an electric actuator to shift from full-time 4wd into 4hi locked, and 4lo locked, and back. There is no ADD on the Limited models as the front axle is always being driven.
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So what would be best would be if the Off-Road and Pro models came with the full-time 4WD system but with a manual transfer case to lock and unlock the center differential and to shift it from 4Hi into 4Lo.
One benefit of the 4Runners also (albeit at the sacrifice of fuel economy) is there are no locking/unlocking hubs because the hubs are bolted to the axle, so the front differential gears rotate even when in 2WD.
So full-time 4WD with the manual transfer case, that would be bombproof.
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05-28-2023, 07:33 PM
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#22
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Join Date: Oct 2022
Location: Upstate NY
Posts: 107
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Quote:
Originally Posted by CutthroatSlam
In addition to the 2014 SR5 and the 2023 ORP, I have a 1994 K2500 Suburban 4WD diesel and a 1999 K2500 Suburban 4WD diesel. The ‘94 is manual shift with electronic actuator on the front differential. The ‘99 is push button shift with electronic actuator on the front differential. In addition to 4Hi and 4Lo, the ‘99 has AWD…when it works.
I have had all sorts of problems with the ‘99 of late. New transfer case and transmission last year. It will shift into 4Hi, which I’ve verified on and off pavement, but the light on the button just flashes. Won’t shift into 4Lo or AWD. I have replaced the shift motor on the case, the Transfer Case control module and the shift button assembly. I was going through electrical tests and documenting results before I had to go back into the office in LA (truck is up in Montana). I have since order a used complete set of shop manuals off eBay and that rig will come down here for me to work on it. Just no fun doing electrical in freezing weather.
I just rebuilt an NP 241-C transfer case and used it to replace the leaking one in the ‘94. Not too hard of a job:
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Remember for 4Lo you need to shift into Neutral. Also you need to engage the 4WD system regularly or the motors/actuators will seize up and stop working.
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05-29-2023, 10:45 AM
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#23
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Location: Utah
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Quote:
Originally Posted by kenwilliams0803
Nah the lever part itself is manual. There is still an electrical component/actuator in the front end that needs to click in for 4wd to work though.
If the lever meant the whole system was 100% manual, it would be bulletproof and highly preferable, to me at least.
Sent from my SM-S901U using Tapatalk
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Quote:
Originally Posted by hoobhoob
The transfer case is manually activated. The front axle is electronically actuated once the transfer case is engaged manually (4WD icon blinking until the axle is engaged.)
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Correct. The factory repair manual clearly shows that it is manually activated:
TOYOTA 2016-2019 4Runner Repair Manual RM27F0U
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05-29-2023, 10:46 AM
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#24
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Quote:
Originally Posted by CutthroatSlam
I just rebuilt an NP 241-C transfer case and used it to replace the leaking one in the ‘94. Not too hard of a job:
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Nice job!
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05-29-2023, 10:55 AM
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#25
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Quote:
Originally Posted by BlueRunner428
One benefit of the 4Runners also (albeit at the sacrifice of fuel economy) is there are no locking/unlocking hubs because the hubs are bolted to the axle, so the front differential gears rotate even when in 2WD.
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The infamous "groaning/grinding noise" then shows up only in 2WD and not when 4WD is selected:
https://static.nhtsa.gov/odi/tsbs/20...54805-9999.pdf
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05-29-2023, 12:28 PM
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#26
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Location: Upstate NY
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Quote:
Originally Posted by fkheath
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Reading that, it says it was a problem unique to the front differentials of 2016-2019 4Runners and can be repaired.
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05-29-2023, 07:43 PM
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#27
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Quote:
Originally Posted by BlueRunner428
So what would be best would be if the Off-Road and Pro models came with the full-time 4WD system but with a manual transfer case to lock and unlock the center differential and to shift it from 4Hi into 4Lo.
One benefit of the 4Runners also (albeit at the sacrifice of fuel economy) is there are no locking/unlocking hubs because the hubs are bolted to the axle, so the front differential gears rotate even when in 2WD.
So full-time 4WD with the manual transfer case, that would be bombproof.
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If I had the choice, I'd choose the multi-mode VF4AM. For 2wd, Full-time 4wd, and Part-time 4wd in hi and lo range.
But the Part-time VF2A in my TRD ORP is adequate for my use.
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05-31-2023, 04:02 PM
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#28
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Quote:
Originally Posted by BlueRunner428
Is it really though? I mean an SR5 with just the A-trac is probably just as capable. The locker just gives the added benefit to be able to have both rear wheels locked together without constantly engaging the A-trac.
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The advantage of the locking differential is that it operates proactively, while the A-Trac operates reactively. A-Trac is brilliant at helping inexperienced drivers get out of a tough spot. A locking differential wil help an experienced driver avoid getting into the tough spot in the first place.
Quote:
Originally Posted by BlueRunner428
So what would be best would be if the Off-Road and Pro models came with the full-time 4WD system but with a manual transfer case to lock and unlock the center differential and to shift it from 4Hi into 4Lo … So full-time 4WD with the manual transfer case, that would be bombproof.
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I used to have a ‘97 Defender that was as you describe. It had full time 4WD and a transfer case with a locking differential and a manual shift lever. The lever had 4 positions: 4hi, 4lo, 4hi locked, and 4lo locked. It was awesome.
Quote:
Originally Posted by BlueRunner428
Remember for 4Lo you need to shift into Neutral. Also you need to engage the 4WD system regularly or the motors/actuators will seize up and stop working.
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Haha. Remember for 4lo you need to shift into neutral and STOP.
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06-05-2023, 07:05 PM
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#29
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Join Date: Dec 2011
Location: Utah
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Quote:
Originally Posted by Captain Spalding
I used to have a ‘97 Defender that was as you describe. It had full time 4WD and a transfer case with a locking differential and a manual shift lever. The lever had 4 positions: 4hi, 4lo, 4hi locked, and 4lo locked. It was awesome.
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My '99 4Runner Limited w/e-locker had similar, nice wide functionality. It had 2hi, 4hi, 4hi locked, and 4Lo. Having both "part time 4WD" and "full time 4WD" in a transfer case that also allows 2WD is nice! I lost that "full time 4WD" functionality stepping up to my 2023 ORP.
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2023 TRD Offroad Premium, nautical blue
Former: 1987 SR5 w/ SAS, 1999 Limited w/ e-locker
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