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A8 Tranny - Have they fixed it?

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Old 07-11-2018, 04:00 PM
  #21  
MikeERWNC
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A lot of 2015 issues go away if the owner would go get the computer flashed with the newest update.
They seem to be constantly tweaking the settings.

My clunk when cold from Reverse to Drive is gone after the update. If it comes back, my dealer is ready to replace parts.

I am only at 54,000 miles and all is good.
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Old 07-11-2018, 04:20 PM
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SoFloVette
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I bought my 2019 with only 4 miles on it. Only have 220 miles but I'm not noticing any issues with the tranny.
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Old 07-11-2018, 06:32 PM
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ChuckerC7
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My 2017 was built 4/17 and haven't had a single problem (Only one's that complain really should drive a KIA or Subaru)
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Old 07-11-2018, 06:55 PM
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Avanti
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But, you do have a choice... buy a manual and NEVER give it another thought.
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Old 07-11-2018, 07:19 PM
  #25  
iclick
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Originally Posted by Avanti View Post
But, you do have a choice... buy a manual and NEVER give it another thought.
...and you'll never be shiftless again.
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Old 07-11-2018, 07:23 PM
  #26  
MAKC7
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Zero issues with my '15 Z51 A8 tranny.
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Old 07-11-2018, 07:32 PM
  #27  
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Originally Posted by kaplana08 View Post
There was a report about a bad torque Converter on a 2019 right out of the box reported on this forum a couple of weeks ago.Research it.
Did a search and couldn't find it. Do you remember if that car had the classic symptoms (shuddering and/or tach fluctuation) or some other issue stemming from a defective part?

Last edited by iclick; 07-11-2018 at 07:32 PM.
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Old 07-11-2018, 07:41 PM
  #28  
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23,000 miles 2016 build date July 2015. No problems! Love the car.
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Old 07-12-2018, 08:22 PM
  #29  
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Originally Posted by MikeERWNC View Post
A lot of 2015 issues go away if the owner would go get the computer flashed with the newest update.
They seem to be constantly tweaking the settings.

My clunk when cold from Reverse to Drive is gone after the update. If it comes back, my dealer is ready to replace parts.

I am only at 54,000 miles and all is good.
I am not aware of this computer flash. Is there a TSB on this? Will this be done on cars that are not having any issues?
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Old 07-12-2018, 08:54 PM
  #30  
MikeERWNC
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Originally Posted by Fick View Post
I am not aware of this computer flash. Is there a TSB on this? Will this be done on cars that are not having any issues?
https://static.nhtsa.gov/odi/tsbs/20...97193-2280.pdf

First off - My Dealership is absolutely the best! Jacky Jones Chevrolet Murphy, NC.

I took mine in. It was slamming into drive. In heavy stop and go ATL interstate traffic, it was giving me issues going 1st to 2nd and back.
The stator job is bad. If they are replacing the stator in the car, they might as well install a new torque convertor while they are in there.
Having been a mechanic in a past life, I know there are jobs I don't want to do and what jobs suck in the summer time. Pulling out the rear end of a Corvette in July sucks!
I took in the car and the TSB. I am friends with most of the guys in service at the dealership so they respect my opinion when it comes to wrenching on a car or bike.
I told them what to look for and wait to work on my car until after lunch. I told them that I did not want to replace the stator. I just wanted the car reflashed with the newest version. I left.
They duplicated everything I complained about. the slam into drive really annoyed me and sitting in the driveway in N for a minute was inconvenient.
They reflashed the computer and said I had the original version from 2014 build on the car before they started. I picked the car up at 1730 and drove home.
The next morning I got in the car and backed out of the garage and no slam. Not even a bump. It has been a couple of weeks and 1000 miles and still working fine.
I know my service writer documented every thing. If I have issues again, I told her we would deal with it in December.
So far so good. 54,000 miles and running strong.
Having a dealership close by with folks who actually care is a huge bonus for me. It is not like dealing with the jerks at a big dealership like Hendrick.
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Old 07-12-2018, 09:20 PM
  #31  
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Originally Posted by Patman View Post
I have 5600 trouble free miles on my 2018 so far and I let it go into V4 mode all the time as well.
Same here on 2016 with 5500 miles.
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Old 07-12-2018, 09:22 PM
  #32  
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Originally Posted by sunsalem View Post
A8 is fine...buy with confidence.
i agree!!
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Old 07-13-2018, 07:52 AM
  #33  
C5Driver
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They have somewhat fixed the A8 but its still very quirky IMO especially when not 100% warm. The torque converter's longevity is also questionable at best.

Last edited by C5Driver; 07-13-2018 at 07:58 AM.
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Old 07-13-2018, 08:23 AM
  #34  
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Originally Posted by C5Driver View Post
They have somewhat fixed the A8 but its still very quirky IMO especially when not 100% warm.
My 2018's A8 doesn't exhibit any strange behavior, not when cold or warm. It always goes into gear smoothly, and always shifts smoothly as well, even on the first 1-2 shift of the day.

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Old 07-13-2018, 09:00 AM
  #35  
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Originally Posted by CorvetteRL View Post
So, all the info on the A8 issues - has Chevy fixed the problems in the 2018 or 2019s?

Thx!
Honestly don't know. They have a number of SB's w/ fixes, but have not seen that GM did a redesign to the A8 and TC. Mostly, a SB w/ "if this occurs, do this".

The C7 is a magnificent car for the money. A shame that it had the transmission problems it did/does when so many other cars don't. Something no buyer should have anguish over whether the $60K+ car they are buying will operate properly

Knowing this going in, and finding out after you buy, you start to have problems w/ the A8, it will be a real "kick yourself in the ***" for buying knowing there could be issues moment. Conversely, if you have no problems,then you'll be driving a truly wonderful sports car. that is world class in nearly every other way.

Even with the 2015 and 2016's there were a large group that didn't seem to have any problems, however, the A8 issues were reported across the entire GM line. https://www.google.com/search?q=2018...nt=firefox-b-1







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Old 07-13-2018, 09:17 AM
  #36  
Always Red Dave
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My 2017 Z06 A8 built 5/17 has 1200 miles and has been awesome . I however do drive in sport mode with the paddle shifting 99% of the time!
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Old 07-13-2018, 09:52 AM
  #37  
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Originally Posted by DAVE396LT1 View Post
No problems here with my A8... but then I have a Z and the problems I saw were all in Stingrays, so...
The A8 transmission system has been riddled with various issues in the C7s having problems with their A8 transmission. Anywhere from transmission overheating to outright complete failure. The Z06 had horrible transmission issues such that GM wanted to add an additional trans-cooler on the car due to massive heating, which caused the Z06 to go into limp mode. I don't think they did since the extra weight would have brought down the 0-60 numbers, and therefore negate the original numbers. As far as I know, nothing has changed with the A8 transmission since its a sealed unit. Maybe you get a good one..or maybe you don't. C7s that are garage queens, or low mileage cars, may not ever experience this issue, but it doesn't mean that it's not there. In either case, I'll stick with my manual Z06 and not worry about it.
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Old 07-13-2018, 01:44 PM
  #38  
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4000 miles on my 17 GS and it is having the torque converter replaced next week . . .
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Old 07-14-2018, 06:42 AM
  #39  
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Originally Posted by Always Red Dave View Post
My 2017 Z06 A8 built 5/17 has 1200 miles and has been awesome . I however do drive in sport mode with the paddle shifting 99% of the time!
99% of 1200 miles?
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Old 07-14-2018, 12:42 PM
  #40  
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Just got my 2016 with 6000 miles on it back from dealership this week. Transmission was shuddering when going to afm mode. They did a triple flush, I have put about 100 more mile on her, so far so good
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