Accepted Answer

Well it could be a few things actually. Could be anything from a sticky valve in the transmissions valve body, a bad speed sensor or even a short somewhere in the wiring. This is what I would suggest. I would first have it scanned. You can have it scanned at auto zone or advanced auto for free. They do this in the hopes of selling you any parts you may need. If you get a code such as speed sensor then you will have a pretty good idea thats what it is. If not, they make a transmission additive for sticky valves that will a lot of times free up something like that if thats what it is. Its like 7 dollars for a pint of it or whatever and you just add it right to the transmission fluid. Usually takes a couple days to work in. I would suggest trying these inexpensive things to start with and see if you can get it solved that way. Being that there wasnt any sign of wear in the transmission pan then I wouldnt think that its anything to serious. If these do not seem to take care of this tghen you may just want to have a transmission garage take it for a test ride and see what they think. A transmission tech is more likely to pick up a problem like this that a lot of others not might recognize because this is what they deal with all the time. They shoouldnt charge anything for the test ride and diagnosis. This is what I would suggest and where I would start myself.

Expert:	stin1974
Pos. Feedback:	100.0 %
Accepts:
Answered:	9/6/2009

Transmissi&on Tech

Chevy Transmission Tech