Author Topic: Auto trans 4wd slipping  (Read 692 times)

0 Members and 1 Guest are viewing this topic.

Bigshrugs

  • Offline Dusty Trails
  • *
  • Turtle Points: 0
  • Posts: 4
  • Member since Feb '18
  • Crawling with Marlin
Auto trans 4wd slipping
« on: Feb 27, 2018, 08:59:25 AM »
Truck is a 87 SR5 TURBO 4runner automatic. I believe the trans is a a340h. Having issues with 4wd.while in 4wd (high and low) and climbing the rear wheels spin only. Front driveshaft kinda twitches like it wants to move but doesn't.  Jack the truck up off the ground and all 4 will spin. I've verified front drive shaft, differential and manual hubs are all in good working condition. And 4wd light does come on.

joeyf

  • Offline Rock Master
  • ***
  • Turtle Points: 599
  • Posts: 209
  • Member since Dec '06
Re: Auto trans 4wd slipping
« Reply #1 on: Feb 27, 2018, 12:31:26 PM »
Where you able to stop the front drive shaft by hand when all four tires where off the ground.

Bigshrugs [OP]

  • Offline Dusty Trails
  • *
  • Turtle Points: 0
  • Posts: 4
  • Member since Feb '18
  • Crawling with Marlin
Re: Auto trans 4wd slipping
« Reply #2 on: Feb 27, 2018, 01:10:02 PM »
I tried stopping the wheels while in the air and could not. Front has locker.

joeyf

  • Offline Rock Master
  • ***
  • Turtle Points: 599
  • Posts: 209
  • Member since Dec '06
Re: Auto trans 4wd slipping
« Reply #3 on: Feb 27, 2018, 01:44:01 PM »
I ran into the same problem a few years ago, nothing while it was on the ground and couldnít stop it in the air. The locker was pushing it self apart hard enough to still work with the tires in the air. Not until I finally pulled the diff that I could see what went wrong. Itís the old style detroit.


Bigshrugs [OP]

  • Offline Dusty Trails
  • *
  • Turtle Points: 0
  • Posts: 4
  • Member since Feb '18
  • Crawling with Marlin
Re: Auto trans 4wd slipping
« Reply #4 on: Feb 27, 2018, 02:54:37 PM »
Hmm. Just put a brand new Yukon in the front. Don't think that's it though. Think it's a tcase problem while in 4wd I can dig the rear tires in and the front drive shaft just twitches And will not turn.

redneckcustoms13

  • Offline The 2K Group
  • ***
  • Turtle Points: 6142
  • Male Posts: 2,273
  • Member since May '15
    • Buy me a beer
Re: Auto trans 4wd slipping
« Reply #5 on: Feb 27, 2018, 08:07:47 PM »
Have you been in the t case lately? It would be very strange that the shift collar for 4wd be damaged but I suppose it could be possible.
80 short bed, longs, hi steer, 4.7 case twin stick, 4.11, 38 tsl, mild built 22r
83 long bed, sas, hi steer, 3rz, w56, 4.56 33s
95 4runner project
06 4 door tacoma street truck

Bigshrugs [OP]

  • Offline Dusty Trails
  • *
  • Turtle Points: 0
  • Posts: 4
  • Member since Feb '18
  • Crawling with Marlin
Re: Auto trans 4wd slipping
« Reply #6 on: Feb 27, 2018, 08:46:34 PM »
No other than changing fluid I haven't touched it. Don't know a whole lot about them hoping for a easy fix

R.DesJardin

  • Online Crawler Guru
  • ****
  • Turtle Points: 662
  • Male Posts: 481
  • Member since Mar '08
    • RADesigns Products LLC
Re: Auto trans 4wd slipping
« Reply #7 on: Mar 03, 2018, 06:46:45 AM »
The  A340H stock t-case is a disaster waiting to happen. The H model t-case is hydraulic actuated everything. It is just possible the clutches are just wore out. I tore one apart once, years ago but never messed with driving one. Plenty of fluid?
R.DesJardin
"If I didn't live in the middle of nowhere!"


2RZ-A340F-Duals-locked FR/RR-IROK's

redneckcustoms13

  • Offline The 2K Group
  • ***
  • Turtle Points: 6142
  • Male Posts: 2,273
  • Member since May '15
    • Buy me a beer
Re: Auto trans 4wd slipping
« Reply #8 on: Mar 03, 2018, 06:51:12 AM »
Is there another case he could easily swap in place do that one?
80 short bed, longs, hi steer, 4.7 case twin stick, 4.11, 38 tsl, mild built 22r
83 long bed, sas, hi steer, 3rz, w56, 4.56 33s
95 4runner project
06 4 door tacoma street truck

 
 
 
 
 

Related Topics

1 Replies
456 Views
Last post Jan 17, 2010, 09:08:52 AM
by dntsdad
2 Replies
1677 Views
Last post Feb 22, 2010, 02:35:40 PM
by Mfxsupervillain
5 Replies
734 Views
Last post Jan 12, 2011, 07:44:13 PM
by RABIDYOTA
1 Replies
538 Views
Last post Sep 26, 2014, 11:28:31 PM
by BenMara
0 Replies
334 Views
Last post Jan 17, 2015, 06:55:20 AM
by TBob