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Pontiac Repair/transmission wont shift


I have a 2002 pontiac grand prix se 3.1 v6 the other day i added 1/2 a qrt of transmission fluid and my shifting problems started..I thought maybe I added too much fluid so I decided to drain pan and change the filter while i was there. I drained a little more than 4 qrts and added 5 took it for a spin and it shifted great, came back and checked fluid and dipstick read 1 qrt low so i added it and now the transmission is back to not shifting out of 1st..Its not slpipping its whining out @ 4000 and will only shift with some coaxing should i drain another qrt or am i wasting my time???please help asap please!

Hi sean:

start the car and let the fluid warm up and check it it should be in the cross hatch area on the dip stick if it overfilled by a little that's okay if it's underfilled that can cause issues usually with that 4 speed rrasnmission it takes almost 7 quarts with a filer change not 5. none the less if the fluid is close to being full it should be stuck in first gear and not up shift. can you manually up shift it by starting in L and as the speed increases pus the shifter up and will it up shift into 2 and then into 3'rd? if not that is an issue internal to the transmission and it's not anything your going to be able to do to fix it. It could be a sticking vlave in the valve body or a bad shift solenoid in the valve body. Or worse a burt up set of clutches. Good luck :-)

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Todd Puccio


General auto repair,electrical issues,driveability issues,anti-lock brakes,SIR systems,HVAC,engine performance,Gm specific. I have worked at my current dealership since the 1990 model year anything much older than that I have limited exposure to. I do not have very much transmission experience so those question you may want to ask of another expert. When you send me a question let me know the exact make/model/engine and year for the car or suv you have it makes it easier to answer the questions that way. If your happy with the answer I gave you please feel free to Donate. This is a free service to you and I am not compensated at all by this web site. I have 22 years of experience to share with you and my knowledge wasn't free to me. I had to pay for my education.


Experience in the area: I have been a technician in GM dealerships for over 22 years and I am a ASE master technician. I work at a Buick and GMC truck store Previously I worked at a Pontiac GMC store for 18 years. I Served a a lead technician when dealership was on a team system. I just recently moved to a Buick,Hummer,Saab Store when my franchise was purchased by this dealership. Organizations: ASE master technician


Education/Credentials:High school diploma,2 year vocational school degree 2 year college degree. Associates degree in applied sciences (auto technology)Awards and Honors: GMC master technician

Awards and Honors
Master GMC truck technician Master ASE technician in 9 categories

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