tranny trouble

Asked by Wrangler74 Jul 26, 2013 at 01:00 PM about the 1994 GMC Sierra 1500 K1500 SL 4WD Extended Cab SB

Question type: General

I got a 1994 gmc 1500 4x4 with a 350 auto.   The tranny loses overdrive and third gear after about 30 mins of driving it i will have first, second and reverse, but if i let it sit for about 15 mins it will shift through all the gears smoothly  and i can go for about anther 30 mins befor it acts up again, the fluid is clean a up to the line.    some guys say the tranny is dun and others say it could be a senser, any kind of help would be great.

3 Answers

migration_judge_roy answered 10 years ago

have you checked the transmission fluid level "full" with the engine running in neutral...if so was the color cherry red yet? did it smell burnt?

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bigc52 answered 10 years ago

have you had throttle position sensor ( TPS) looked at? I know on some vehicles the tranny gets a signal from the TPS.you might take it to a tranny shop and have the TPS checked out,its worth a try.......bigc52

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