qwksvt

Just read a new TSB from GM dated Feb 27th 2017 that now includes the 2017 model year C7, and Z06, for the torque converter shudder. Only replacing the fluid 3 times, no mention of torque converter replacement or updated part numbers. Only specifies new Mobil 1 ATF as the fix.
Has anyone had a fluid replacement repair their concerns?

Strake

Do you have a copy you can post here, or on the Sticky area?

23/C8Z

can you describe what "shudder" you're referencing? When my car was new the car lugged a bit a few times while entering a highway in 5th or 6th gear light to medium throttle. That was with less than 200 miles or so maybe 100.

car now has 950 or so and has exhibited zero signs of same during similar runs. I'm thinking it was the trans still learning.

if that's what you're referring to?

qwksvt

I don't have a copy, just read it while talking to a buddy who works at a GM dealer. Was just wondering if anybody had the fluid exchange as this fix has been around for a while now.

KMS-CO

Here we go again! and again and again....

ddelallata

Any chance you or buddy could take a pic and post it here?

bbcb

gm still does not have this fixed ...sweet

ddelallata

It would be funny and frustrating at the same time if all this time the culprit was just the fluid .

KMS-CO

It's not the fluid, I'm not sure why it would need flushing unless some other contamination is involved. This protocol was instituted back in 2015 when the A8 first started going whacky and before they started re designing and replacing torque converters. That said I'm not sure why GM would implement such a TSB again when it didn't work in 2015. I wonder if GM will ever fess up to this disaster and come clean with its owners on this issue. The fact that any time this comes up at a GM discussion and GM engineers play dumb or say it's only 2-3% of the total A8 population that is problematic is such an obvious lie now that GM is really starting to discredit its self as a respected auto maker. Sometimes you have to own your mistakes in order to move on. IMO GM should refund the MSRP price paid over the standard M7 to each and every A8 owner for selling them a junk automatic transmission and then charging an up charge for that junk. If not a refund GM should extend the warranty on the A8 to 10 years or 200,000 miles to regain owner confidence.

musclecar6

Many of us are waiting in the wings for GM to come up with the solution to the well known A8 issues. I would like to buy a Z06 with a sorted out auto tranny and to hold me over ( since I've been vette less for over 2 years since I sold my 2010 LPE supercharged GS), I picked up a 2014 Stingray A6. Now in all fairness, the first iteration of the A6 back in 2006 ( I bought a C6 A6/F55 coupe I kept for 7 years and had the tranny tuned twice by different well known forum tuners, but didn't help much. That tranny was fine for Caddy style daily driving, but didn't have rev matching and would lurch when paddle shifting to a lower gear) wasn't any great shakes, but at least it operated okay under normal daily driving.

I eventually traded that 2006 C6 A6 for a 2012 CTS-V with a dramatically improved A6. That car had nice rev matching and staged up shifts as the 2012 improvement yielding faster upshifts. Just last week, I traded that Caddy in on the mint 6500 mile 2014 C7 A6, that has an even better tranny with improved shift speeds both up and down and runs seamlessly with the V4 mode when just cruising around. So I've owned and experienced the A6 as it's made the trek from **** poor introduction to final well developed RELIABLE piece in the 2014 Stingray.

After the not fun experience I had with the 2006 C6 tranny limitations ( The only reason I kept it so long was cause I had Lingenfelter put a Maggie supercharger package on it with their usual first class bullet proof install that ran perfectly for 7 yrs and 48000 miles), I promised my self I would not go down the same road with another Vette auto tranny till any problematic issues were resolved. So, I still wait.

Red C8 of Jax

I would really like to see that TSB before I jump off the bridge.

rmorin1249

They replaced my fluid but it was in conjunction with a TC and stator support replacement. Why would a fluid change correct the shudder? Are they not filling with the correct fluid at the factory?

KMS-CO

bjones7131

I too would like to see the TSB or I wonder if U could do a GM TSB search and have it turn up??

Z06 1of38

Always interesting to see how educated "new" forum members are on certain topics...

SpeedUp

LOL, is it that guy again? forget his names

JoesC5

I was reading a magazine review of the 2017 Cadillac CT6(Cadillac's flagship) a couple of days ago, and they mentioned the A8's bad behavior at low speeds/low gears.

If one was also looking at a new Lexus or Mercedes, with their silky smooth transmissions, why would one even consider a Cadillac with an A8?

If the Cadillac engineers can't get it working correctly in their flagship CT6, who believes that a Chevy engineer can do better?

cam30era

"Alias"..

MacMulkin

You can view the service bulletin at the Corvette Action Center:

http://www.corvetteactioncenter.com/...tate-1324.html

KMS-CO

Looks like the A8 circle jerk is still alive and well at General Motors 😖