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Torque convertor

 
erics erics
New User | Posts: 1 | Joined: 02/06
Posted: 02/26/06
02:18 AM

Hello everyone ...  i have changed out the transmission in my 82 gmc c1500. It has a 5.7L 350 engine and a 350 transmission. In drive and reverse the transmission pulls fine, but it will not shift. I used the old torque convertor. So my question is that can a bad torque convertor cause a transmission to not shift. I have tried two different modulators and adjusted both...this did not help. Does this sound like an enternal transmission problem or something else. Any comments or suggestions would be appreciated.  

 
Turbo Buick Turbo Buick
User | Posts: 128 | Joined: 11/05
Posted: 02/26/06
10:44 AM

Inspect the govenor *** for a stuck valve or a broken gear. Its located under the round cover on the drivers side of the trans.  

 
66mustang289 66mustang289
New User | Posts: 16 | Joined: 03/06
Posted: 03/03/06
04:51 AM

I had the same problem with my 88 S-10, (it has a 383 stroker though) but i discovered the detent cable (kick down) was stuck out, causing the transmission to constantly be in passing gear, you should be able to pull on the cable, and it should pull itself back, like spring tension  

 
kings-x59 kings-x59
New User | Posts: 7 | Joined: 02/06
Posted: 03/04/06
05:07 AM

A bad torque convertor won't cause it not to shift, however what was inside the torque convertor might. If the old converter wasn't flushed before reinstall, the crud from the old transmission was still in it, and now may be in the valves causing them to stick.  

 
Brewer_clan Brewer_clan
New User | Posts: 1 | Joined: 08/09
Posted: 08/16/09
02:26 PM

erics:
Hello everyone ...  i have changed out the transmission in my 82 gmc c1500. It has a 5.7L 350 engine and a 350 transmission. In drive and reverse the transmission pulls fine, but it will not shift. I used the old torque convertor. So my question is that can a bad torque convertor cause a transmission to not shift. I have tried two different modulators and adjusted both...this did not help. Does this sound like an enternal transmission problem or something else. Any comments or suggestions would be appreciated.

Hello. Erics. i have a 1990 gmc C1500 5.7L with the 700R4 trans.
i was having similar problems. except i could not get the car into reverse. but i could get it into first gear. i just had the transmission rebuilt. my forward clutch plates were welded together, this also made some clutch materal flake off of the clutch rings contaminating the A.T.F.. this materal made it into the torque converter. my mecanic said that if i used the converter again the clutch materal would make its way out of the torque converter and cause the same problem. so if i was you i would get a new torque converter and flush the system. mabey your clutch plates are still good. if not. you will need a new trans/ rebuilt trans.  

 

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