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Unread 09-11-2003, 08:55 AM   #1
greasefingers
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1994 ZJ 
 
Join Date: Sep 2003
Location: Northern VA, USA, NJ
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Help with Transmission Slipping

My 94 GC with 160K miles on it is having problems. The transmission is slipping at low and high speeds. I dropped the trans cover and replaced the filer 10K ago. Has anyone ever adjusted the two band adjustments? Am I in for a new tranny?

It's a 4.0 L QuadraTrac with automatic transmission.

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Unread 09-15-2003, 10:32 AM   #2
automan25
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Obviously the first thing you'll want to do is adjust the bands and see if that cures the problem. It's a whole lot easier (and cheaper) than replacing your transmission. Get a service manual for the proper adjustment procedure. You'll probably need a couple of new tools. Namely an inch/lbs. torque wrench and a funky curved extension to reach the front band adjustment screw. (read the instructions that come with the torque wrench to find out how to use an extension properly with a torque wrench)

Don't wait too long to do this. When your transmission is slipping against the bands, it is wearing out the bands and generating a lot of extra heat. Once the bands are worn out completely no amount of adjustment will cure the problem.
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Unread 09-16-2003, 06:06 PM   #3
greasefingers
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thanks

Quote:
Originally Posted by automan25
Obviously the first thing you'll want to do is adjust the bands and see if that cures the problem. It's a whole lot easier (and cheaper) than replacing your transmission. Get a service manual for the proper adjustment procedure. You'll probably need a couple of new tools. Namely an inch/lbs. torque wrench and a funky curved extension to reach the front band adjustment screw. (read the instructions that come with the torque wrench to find out how to use an extension properly with a torque wrench)

Don't wait too long to do this. When your transmission is slipping against the bands, it is wearing out the bands and generating a lot of extra heat. Once the bands are worn out completely no amount of adjustment will cure the problem.
Thanks for the reply. I tried to adjust/check the bands a couple years back, but I failed due to the funky curved wrench that you mentioned. I will search for one first before attemping this :-)
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Unread 09-16-2003, 07:39 PM   #4
RockPaws
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How is the fluid level while in neutral? Make sure its correct, this trans can be tempermental with incorrect level. I would also drop the pan and change the filter again. Check for metal in the pan.

My 97' Grand transmission went out at 60K. The over drive unit is the part that usually fails (and it did) due to lack of oil to it(metal in the pan too). The oil passage is too small and needs to be drilled out to improve oil flow.

If it does need a rebuild have them install more clutch disc's in the over drive unit. Their are 2 clutch packs, one can take one more and the other 2-3 more.

If you want a transmission shift kit. I have a TransGo kit for the JGC auto trans. I bought it for a customer and did not use it. I put it in our JGC at overhaul... very nice shifting trans! Email me.
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