Quote:
Originally Posted by MJinNC
So had the TC replaced about 300 miles ago, all was great and was actually fun to drive the car again with out the shudder. Today, Got a slight prolong shudder going 57 with cruise on at about 1400 rpms. I did notice that they did tweek the rpm's to try and keep it above 1100 while cruising and the mpg has gone down about 1 mpg doing so, which I will take to eliminate it getting stuck at that low rpm. Don't know what the next thing is to do if the shudder comes fully back.
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You have 2 options if you really want to keep this car:
1: Get HP Tuners (about $500) and take the trans slip to 0% for 7 and 8 gear. This voids warranty.
I read somewhere the trans slip was added to prevent false knock...not looking for source again.
2: Go with a different transmission fluid. Again voids warranty. (I went Amsoil, but need many more miles to validate long term cure).
The GM Trans fluid looked like gray water at 23,000 miles in my car (shutter stated around 11,000 miles). I was surprised. GM given up on trans fluid and Mobil1 now makes the fluid for the A8.
I didn't trust GM or Mobil1 for the new trans fluid after dealing with more than half the miles having issues. I wanted a true lifetime fluid (100K miles) Not a 36,002 mile warranty failing fluid.