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Chevrolet Corvette Transmission Problems



  • bolivarbolivar Posts: 2,316
    That's not normal.
  • Thanks for the reply. To what are you referring when you say "that's not normal"? Do you mean the break-in period or the warranty or something else?
  • bolivarbolivar Posts: 2,316
    I wasn't replying to you. Replying to rolinski. About his problem with a 5 second delay after shifting into gear before the car will move - that's not normal.
  • I have a 2005 corvette and started having the noise from the back trans axle at only 20,000 miles. The dealer told me, it is a defective propeller shaft in the middle of transmission and must be replaced. But my warranty is expired, and must pay $2500 to fix it!!!!!!!!!!!!
    This is my 3rd Corvette, and my C5 corvette until 120,000 miles was flawless. But my C6 is very disappointing. Shame on GM and its limited 3 years warranty on 2005 corvette!!!!!!!!!
  • bolivarbolivar Posts: 2,316
    Most cars have a 35 month, 36,000 mile warranty.

    In mid-2006 GM went to 100,000 mile 'driveline' warranty for most of their cars.

    I'm old enough to have bought several new cars with a 12 month, 12,000 mile warranty. The last one was a 1991 SHO, which is only 18 years ago.
  • The clutch's in our posi-trac units have been known for years to give off the noise were all hearing. Since the "save the whale" issue has been with us the additive used in rear end oil no longer contains whale oil. I've owned vettes for years, some do sound louder than others, but it's common. Drive your car into a large parking lot, turn it hard right or left and make several circles, than turn the opposite direction and do the same, this will allow the oil to free up the clutchs. Check at your local auto parts store and see if they have rear end oil with the whale oil, I've found it as a additive, meaning it was just the whale oil, added it and rtemoved most of the noise. My Vette is a C5/ 6speed Convert. and yes, when itr sits a few days when it's cold, in first gear I hear it. "Save the Wave"
  • bolivarbolivar Posts: 2,316
    Not many people are old enough to know the 'whale oil' story.

    I agree with the 'circles' or 'figure 8's' driving to help with rear end clutch noise.
  • Hi Bolivar, sort of tell off are agr doesn't it! My son found me some here a while back and it really helped. But the old figure 8 , or circle trick gets rid of most of it.
    I did some reading a while back aqbout the traction control button located behind the shiffter, leave it alone and it's active, push it once and trraction control is shut off; but did you know, if you push it donw and hold it for about 6 to 8 seconds it puts the car into competion mode, try it, it will make you smile about your Vette.
  • bolivarbolivar Posts: 2,316
    Yes, and if you are not careful, the rear will be pointing where the front was pointing a second ago, or it will launch into a curb.
  • One *does* have to be careful where one points a RWD car with that much power under foot.
  • cnwcnw Posts: 105
    It's soooo much fun to "turn left and steer right"!!!!!
  • I have been reading a lot about folks having all sorts of trouble with their new 'Vettes after driving them relatively few miles.
    I know that this might not be what a lot of people want to see but actually if you buy a Corvette that is a few years old and has 20,000 miles or so on the meter
    because by the time this kind of mileage comes up all the problems the car had hopefully will have been taken care of one way or the other.
  • esharpeesharpe Posts: 6
    I now have 9600 miles on my 2008, have had right rear axle replaced, transmission had to have new seals, and have had and am still having the shift problem you are having and it stinks to be told this is normal, in a parking lot and at low speeds and normal, not agressive acceleration, it jerks very hard, makes for a bad driving experience, I hate this. I have a 1969 Stingray Conv, auto and with its age, its a heck of a lot better response and driving pleasure than this car. Guys I am going for the Lemon Law, can't continue with this and just how bad is this going to be in another six months, not sure I want to be a part of this car.
  • Keep us posted on anything you find out. I too am disgusted by the "this is normal" claim. If it is normal why isn't it advertised as a "sloppy, lagging transmission"? :mad:

    I took my 2008 with 2,600 miles in and got the same claim that the lagging downshift is normal and the dealer quoted the GM post about "aggressive acceleration" although I adamantly told them it happens with just normal acceleration. Regardless it should not happen at all on a $50k+ car.
  • esharpeesharpe Posts: 6
    I have the same or at least a similar problem and after having my right rear axle first was (1) new fluid in rear end, (2) rebuilt rr axle, (3) then finally replaced rr axle, and the transmission, (1) can not get it to replicate the problem, (2) it is normal, (3) replaced seals in trans and told this is the fix, still having problems with hard shifting in parking lots and low speeds, told once more, normal and given a copy of #PIP4112H: Sag or Hesitation on Acceleration Bulletin (Normal Operating Characteristics). I think Lemon Law and that fellow Corvette owners is where I am headed, with 11,399 miles I am not sure it is in the best interest to wait.
  • gmcustsvcgmcustsvc Posts: 4,001
    I am from GM Customer Service. Do you currently have a case with GM? If so, what is the case number? Is the main issue now that you are having hard shifting at low speeds? Or do you have other shifting problems? What is the VIN of the vehicle? You can direct message me this information. Thank you,
    Mariah GM Customer Service
  • Hello Mariah,

    I also have a couple of posts in this thread with issues I am having with my 2008 with 6-speed auto trans - lagging/hard shifts after downshifting. I have started a case with GM Customer Service case #71-814153843. I bought my car in Feb 2009 only have 3,000 miles on it but have had it in the shop 3 times now for trans issues. I am currently waiting on parts as the dealer is going to perform service as is recommended by PIP4395E. I have mixed feelings. On one hand I am glad they are trying something but on the other hand this bulletin does not sound like the issue I am having. I think the dealer and customer service are tired of me complaining and are grasping for anything to appease me.

    IMO given all the issues with this particular trans I think GM should go back to the drawing board and come up with a solid solution to all these issues - a complete makeover if you will. The real kicker is when GM puts out a bulletin claiming these issues "are normal" and the dealer keeps quoting the bulletin. :mad: A $50k+, supposed high performance sports car should not have ANY trans issues. I have had several lesser GM cars with much better transmissions than this one. Take a look at the 1997 Pontiac Grand Prix GTP trans for a good example. That car was obviously not at the same level as the Corvette but it had an excellent drive train for its performance level.

    Just hope GM does the right thing and provide an acceptable solution to all involved. I know after buying or being responsible for other family members buying a dozen or more GM cars over the past 15 years I may be through with them if they do not get this trans issue resolved. :sick:
  • gmcustsvcgmcustsvc Posts: 4,001
    Again, I am sorry for the issues you have experienced. The dealership is trying to fix the issue, and I hope the bulletin is going to be the fix you need. However, I would appreciate it if you keep me posted on how everything is going. Thank you,
    Mariah GM Customer Service
  • I just joined this forum out of frustration about this exact issue. My 2007 vette is my third, having previously owned a 1993 and a 2000 -- neither had the delay I am experiencing with the downshifting. I have taken my vette to two Dallas area dealerships at different times over the past couple of years. I even left it with the service guy for a week to drive around as his own car, to make sure he was experiencing the same problem I was. Both assured me that this is the way the transmission is supposed to perform. Given all the improvements made over the past two decades, it's hard for me to believe that GM would make a transmission for today's vettes that is less comfortable to drive than previous models. However, I am at least a little comforted that this problem is not something that is exclusive to my car.
  • I wanted to wait a little longer until I had enough time to drive my 2008 vette enough to confirm for certain, but I am about 80-90% sure my issue has been fixed. I had it at the dealer this past Mon-Tue (04/12-04/13) and they performed repairs outlined by GM bulletin PIP4395E. At first when I read the bulletin it did not sound like my issue, as it talks more about harsh 2-3 shifts and does not mention the downshifting delay, but I have to say I am cautiously optimistic that the problem is solved. I have not had a chance to drive it enough to make me feel 100% that the problem is gone, but so far so good.

    Here is another forum that shows the bulletin: PIP4395E

    I would suggest you insist the dealer perform this service as outlined by the bulletin, and get GM Customer Service (800-222-1020) involved if necessary.
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