Transmissions and Drivetrain Need help with your trans? Problems with your axle?

89 TH700R4 Shift problem

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Old Jan 3, 2012 | 10:44 PM
  #1  
Duaine Reynolds's Avatar
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89 TH700R4 Shift problem

On my way to work about 6 miles down the road, tranny slipped out of OD like going into neutral. I pulled over and shifted into park, and sat a minute, then shifted to OD and pulled onto the highway. Tranny would not shift out of 1st gear, no matter if I shifted manually or left it in D or OD. I have had no problems until now. I checked the fluid in N and the level was ok but noticed bubbles at the top of the fluid line and a leak on the cooler return line. The external cooler was warmer than the radiator despite the temp outside was in the low 30's. Could the cooler line leak cause this by allowing air into the tranny? Fluid was good in appearance and did not smell burned. Thanks for your help.
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Old Jan 3, 2012 | 11:17 PM
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Randy82WS7's Avatar
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From: 62656
Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"
Re: 89 TH700R4 Shift problem

a few bubbles is ok

alot if bad

theres a huge difference


hows the fluid look?

is it bright red? how doe sit look on a clean white cloth or towel?

red red

or a maroon or brown?


doesnt it smell like trans fluid that is still new in the bottle?

how many miles on it?


is the TV cable set correctly?

are you sure about that?

if not then do not drive it any more

set it correctly and for sure

if it is set incorrectly and by too much then it will burn it up

Last edited by Randy82WS7; Jan 4, 2012 at 12:17 AM.
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Old Jan 4, 2012 | 09:41 AM
  #3  
Duaine Reynolds's Avatar
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Re: 89 TH700R4 Shift problem

Fluid looked new, smelled new. Was a clear red. Maybe 266,000 miles bought it used last year. had maybe 6-10 small bubbles on the stick. Will check the TV cable today. Thanks.
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