Tranny fix

1989 GMC SIERRA
60,000 MILES • 5.7L • V8 • RWD • AUTOMATIC
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BIGBILL3D
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  • 2 POSTS
I took a TH400 out put TH350 in reverse works well forward gears don't work.I can jack back wheels off ground wheels spin in forward gears weakly. Supposed to be a rebuilt transmission what can I check before I take it out
Feb 12, 2016 at 4:29 AM
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BIGBILL3D
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  • 2 POSTS
Has new torque converter fluid level is fine new drive shaft and yoke
Feb 12, 2016 at 5:02 AM
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HMAC300
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  • 48,601 POSTS
have the rebuild person fix it sounds like an internal problem.
Feb 12, 2016 at 7:11 AM
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