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Pontiac Grand Prix Transmission Problems



  • gearrgearr Posts: 21
    It sounds like a valve in the trans. is sticking and that is not good you may want to replace it.
    it may put fine metel shaveing in the trans.
  • I have an 05 grand prix with 52,000 miles. I think it is slipping. When I back up and put it in drive it slips and then surges and sometimes while driving up hills it does the same thing. It doesn't always do it so I'm afraid to have the dealer look at it. Last time I took it there they charged me 100.00 and didn't find anything. Any ideas?
  • It sounds like your catalatic convertor which is a covered item up to 80000 miles or 10 years. for some earlier models with known problems, GM extended this warranty to 2 years or 120000 miles.
  • I meant to say 12 years and not 2.
  • do you mean while at a stop when you give it gas it tries to die? i have that problem with my 93 i took it to a dude and said it was the spark plugs but i knew it wasnt and so i still have the problem and dont know what it is
  • how long will the transmission in a 2001 Pontiac Grand Prix last? and how often should you change your filters and fluids. in order for the car to perform to its full potential ?

  • Major problem..please help with some suggestions. 99 grand prix. I pulled it out of my drive this morning (in reverse) then i put it in drive, it sounded like it's tired were just going...but it wasn't going anywhere..i put it inot low 1..i started to go. So i turned around and pulled back in my drive. Called my husband to make sure i could drive it in 1..he said i would have to drive very i went to leave, and i couldn't get my car out of the driveway (ALOT OF SNOW)..then some people came by to help me get me out of my driveway..and now no gears but Reverse are working. I did check the fluids..that seems fine..any suggestions before i go buy a new car?? just hoping this could be a nice quick fix instead of a whole new car...
  • rhtransrhtrans Posts: 84
    Sorry...most likely an internal trans problem...hope you enjoy your new vehicle!
  • rhtransrhtrans Posts: 84
    Change the fluid at least every 30 thousand miles. How long it will last? I've seen them go 250 thousand and not last 40...depends on what day it was
  • spj2spj2 Posts: 1
    I own a 2001 GP, GT with ~116k miles. Does anyone know where to find, in writing, the GM extended warranty (12 yrs/120,000 miles) for the catalytic converter that purplefeak8 talks about? I had my mine replaced a few months back. I didn't know it was still under warranty. I'd like to see if they will refund my money. The work was done by an ASE certified mechanic.
    Also, I will be picking up the car from my mechanic who was replacing the pressure solenoid valve in the tranny. My car was also doing the "hard shifting" after it had been driven a while. We'll see what happens.
  • shashadela,

    I was told the warranty was 80,000 miles on the catalytic converter for my 1999 Grand Prix. If you see some of my other posts, they replaced it while they were trying to find the problem with the jerking, which turned out to be a $40 computer program. Good luck.

    After two pressure solenoid valves, one torque converter, and $1,200 my car was still being bad until they upgraded the computer program.
  • will a 1989 pontiac grand prix se 2.8 tranny interchange with a 1990 grand prix se 3.1 :confuse:
  • shawn888shawn888 Posts: 7
    Hey guy's,
    I'm new to this forum and so far I like it.
    I hope somebody can help me with a transmission problem that I have.When I'm on the highway and I want to pass,the transmission does not want to down shift.It buckles until I let go of the gas and then it's fine.Or if I want to have little fun,the trans when it shifts,it shifts hard and it wont stop till I shut the motor off.When I turn the power off,everything is back to normal.It's like I have resetted something.Could it be that there is some kind of chip or selenoid scrued up?Because the probleme goes away when I restart the car.Can anyone help?
    Thanks. p.s.Pontiac Grand Prix GT 1999

  • shawn888shawn888 Posts: 7
    Hey Guy's,
    I am new to this forum and it looks like you guy's help each other allot.
    I have a 1999 Pontiac Grand Prix GT.My probleme is,If I go and give it some gas to you know,,have some fun with the big boys,,the transmission buckles.And after that the transmission shifts hard ,like it's detracked.But I shut the power off and restart,everything comes back to normal.Could this be some kind of sensor problem?
    This thing is bugging me.Any help is appreciated.
  • Shawn888,

    The problem I had with my '99 GT transmission after many many despairing trips to the garage was resolved by another poster on here (Rob94). The computer program was faulty on my car. Of course, I had my transmission pulled and different parts replaced multiple times to no avail. The $40 computer program fixed it after spending $1,500 in other visits to the garage.

    If you want the whole saga, you can read my other posts on this forum. Good luck. You might want to print some of the things out from this forum and take them to your service manager.
  • shawn888shawn888 Posts: 7
    Thanks montana cat,
    so it would be reprogramming of the computer?I will chek it out.
  • Shawn888,

    That worked for my '99, so hopefully it works for yours. I know how frustrating this problem can be!
  • shawn888shawn888 Posts: 7
    Hey montana cat,
    I went to the GM dealer ship and they did not want to reprogramme my computer.
    They said that is not the probleme.But they could not tell me the probleme. :mad:
    I think they just want to make money off of me.I am paying for the service and they dont even want to do that.
    Anyways,I told him off and I left. :mad:
    Now what do I do?
  • :cry:

    I don't know what to tell you other than maybe try another dealership. That really stinks! I can't promise that it is the computer, but I just know that is what finally fixed mine and several others on here.

    I was also told to go to a transmission shop about my car, but I never went there because I wanted my dealership to get the job done right (which took many trips)! Ugh!

    This is obviously a Grand Prix problem with some cars and one GM should fix!
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