Question about 1991 GMC C1500

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I have a 700-r4 transmission in a 1970 Elcamino. This shifts perfect until the car warms up. When car is warm it goes in and out of overdrive, but when the car is at full operating temp. it will not go into overdrive at all

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  • tom6269 Oct 02, 2009

    the car is total frame off restored. Everything is less than a year old - 2500 miles

  • tommy6484 May 11, 2010

    when was the last time the filter was changed

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  • 16 Answers

Most likely it needs to be rebuilt.

sounds like the seals are in bad shape, and will have to replace 3 4 clucthes

Bruce Pike

Posted on Oct 02, 2009

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Posted on Jan 02, 2017

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DOES ANYONE KNOW WHY MY CHRYSLER 300 DOES NOT WANT TO SHIFT INTO OVERDRIVE WHEN ITS COLD OUTSIDE SHIFTS FINE AFTER THE CAR IS COMPLETELY WARM AND DOES SHIFT INTO OVERDRIVE WHEN IT IS COLD AFTER MY RPMS HIT...


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