Chevrolet Corvette Stingray C7 Forum - View Single Post - [ANSWERED] 2016-2017 A8 TC Shudder

KMPrenger · 07-24-2018, 12:03 PM

<rant>

I've experienced the shudder one time (over a year ago) on my 2016 SS. Had it checked out, but nothing was done at the time, although I was aware of the triple flush. I should've pushed harder for the flush back then, and honestly, I've contemplated just taking it back and telling them its doing it again. They can't reproduce it, and it leave no code behind (from what I can tell) but its very well known issue so they would probably perform the proceedure.

But here's my thoughts. At what point, can something like this become a class action suit? I mean...I like the A8 for what it can do, and how it drives when its working well. But this TC issue is just out of hand.

Think about it and all the vehicles affected. Chevy Silverado, Corvette, Camaro (V8, V6, and 4 cylinder), Colorado, GMC Sierra, and Canyon, from the year the A8 was introduced up through 2018...we are still seeing issues with the TC. I might have left out some vehicles...is the Cadillac ATS and CTS also affected? I'd think so.

At this point its just ridiculous. I agree with others, that it could likely be fixed with different programming, but GM doesn't want to do that. I know two 2017 Colorado V6 owners...and both of them are having TC issues. One is getting it replaced right now.

GM just now gave in and finally released a good TCM tune for the "shudder" issue 2015 and 2016 GM midsize trucks that fixes the A6 transmission from stumbling under low rpm, but load conditions. They've released prior tune updates to help the issue, but owners were still having frustrations. This latest tune seems to be the final fix. This was never a mechanical issue, but a tuning issue right from the get to, designed to maximize mpg. A few drivers are reporting a slight decrease in their avg mpg, but the truck now drives great (FYI...I'm mostly happy with my 2015 Colorado without this updated tune, but I can get my truck to do the shudder if I want).

Will GM every say "screw it" and give us a tune that works correctly, but maybe decreases our highway mpg by 0.50???

07-24-2018, 12:03 PM	#128
KMPrenger Drives: 16 Camaro SS, 15 Colorado Join Date: May 2009 Location: Jefferson City, Missouri Posts: 13,967	<rant> I've experienced the shudder one time (over a year ago) on my 2016 SS. Had it checked out, but nothing was done at the time, although I was aware of the triple flush. I should've pushed harder for the flush back then, and honestly, I've contemplated just taking it back and telling them its doing it again. They can't reproduce it, and it leave no code behind (from what I can tell) but its very well known issue so they would probably perform the proceedure. But here's my thoughts. At what point, can something like this become a class action suit? I mean...I like the A8 for what it can do, and how it drives when its working well. But this TC issue is just out of hand. Think about it and all the vehicles affected. Chevy Silverado, Corvette, Camaro (V8, V6, and 4 cylinder), Colorado, GMC Sierra, and Canyon, from the year the A8 was introduced up through 2018...we are still seeing issues with the TC. I might have left out some vehicles...is the Cadillac ATS and CTS also affected? I'd think so. At this point its just ridiculous. I agree with others, that it could likely be fixed with different programming, but GM doesn't want to do that. I know two 2017 Colorado V6 owners...and both of them are having TC issues. One is getting it replaced right now. GM just now gave in and finally released a good TCM tune for the "shudder" issue 2015 and 2016 GM midsize trucks that fixes the A6 transmission from stumbling under low rpm, but load conditions. They've released prior tune updates to help the issue, but owners were still having frustrations. This latest tune seems to be the final fix. This was never a mechanical issue, but a tuning issue right from the get to, designed to maximize mpg. A few drivers are reporting a slight decrease in their avg mpg, but the truck now drives great (FYI...I'm mostly happy with my 2015 Colorado without this updated tune, but I can get my truck to do the shudder if I want). Will GM every say "screw it" and give us a tune that works correctly, but maybe decreases our highway mpg by 0.50??? __________________ 2016 Camaro 1SS - 8-speed - NPP - Black bowties 2010 Camaro 1LT V6 (Sold. I will miss her!) Last edited by KMPrenger; 07-24-2018 at 12:24 PM.