A8 Transmission failure tracking
11-14-2018, 11:51 AM
#822
Le Mans Master
Member Since: Nov 2015
Location: Lake Havasu City Arizona
Posts: 7,326
Received 3,439 Likes
on
2,059 Posts
There was a poll taken on this forum at one time and that was what the percentage was from the participants. It was actually about 3% so I deducted that some that had problems and didn't respond could push that up a little. Unscientific on my part and anecdotal, but the poll had quite a good response in the amount of participants. Most issues were with the 2015 group and decreased each model year. Here is the link for results:
https://www.corvetteforum.com/forums...-tracking.html
All in all with the amount of owners participating it was clear the majority that had no issues. That's my theory and I'm sticking to it.
https://www.corvetteforum.com/forums...-tracking.html
All in all with the amount of owners participating it was clear the majority that had no issues. That's my theory and I'm sticking to it.
Last edited by joemessman; 11-14-2018 at 11:52 AM.
11-14-2018, 11:53 AM
#823
11-14-2018, 11:54 AM
#824
Le Mans Master
Member Since: Nov 2015
Location: Lake Havasu City Arizona
Posts: 7,326
Received 3,439 Likes
on
2,059 Posts
11-15-2018, 10:06 AM
#825
Instructor
There was a poll taken on this forum at one time and that was what the percentage was from the participants. It was actually about 3% so I deducted that some that had problems and didn't respond could push that up a little. Unscientific on my part and anecdotal, but the poll had quite a good response in the amount of participants. Most issues were with the 2015 group and decreased each model year. Here is the link for results:
https://www.corvetteforum.com/forums...-tracking.html
All in all with the amount of owners participating it was clear the majority that had no issues. That's my theory and I'm sticking to it.
https://www.corvetteforum.com/forums...-tracking.html
All in all with the amount of owners participating it was clear the majority that had no issues. That's my theory and I'm sticking to it.
IMHO, this data has gone a bit stale and I am dubious of any extrapolations made from the Forum C7 data set (in isolation).
I'm glad the Forum C7 data set exists, but we now know that (at best) it only represents approximately one 11th of the entire picture (for GM).
It's no longer just about the C7, there are ten other cars on the list that have the A8. So..
I'm also concerned about the long term affects of all that shuddering and vibrating on other components and systems of the car. (e.g. transmission mounts etc..)
Last edited by VaydorVette1; 11-15-2018 at 10:21 AM.
11-15-2018, 10:46 AM
#826
Le Mans Master
Member Since: Nov 2015
Location: Lake Havasu City Arizona
Posts: 7,326
Received 3,439 Likes
on
2,059 Posts
Fair enough.
IMHO, this data has gone a bit stale and I am dubious of any extrapolations made from the Forum C7 data set (in isolation).
I'm glad the Forum C7 data set exists, but we now know that (at best) it only represents approximately one 11th of the entire picture (for GM).
It's no longer just about the C7, there are ten other cars on the list that have the A8. So..
I'm also concerned about the long term affects of all that shuddering and vibrating on other components and systems of the car. (e.g. transmission mounts etc..)
IMHO, this data has gone a bit stale and I am dubious of any extrapolations made from the Forum C7 data set (in isolation).
I'm glad the Forum C7 data set exists, but we now know that (at best) it only represents approximately one 11th of the entire picture (for GM).
It's no longer just about the C7, there are ten other cars on the list that have the A8. So..
I'm also concerned about the long term affects of all that shuddering and vibrating on other components and systems of the car. (e.g. transmission mounts etc..)
The following 2 users liked this post by VaydorVette1:
jimtreber (11-23-2018),
vettekat2007 (06-04-2019)
11-22-2018, 01:27 PM
#829
I have put about 300 miles on the car and I took it for a ride yesterday and the problem has returned. No as bad as it was but it has returned. The problem does go away if I put it in manual shifting mode so I know that the AFM is the problem. Just to clarify, the car has the 8 speed auto transmission in it with a build date of 10-2015.
I have attached the latest bulletin from GM, it is dated 10/11/2018. Half way down the first page it states they will release a new procedure in 1st quarter of 2019 and do NOT replace any parts at this time or the dealer may be charged for them. It does seem to say that a second flush might be needed, I will see what my dealer says.
I have attached the latest bulletin from GM, it is dated 10/11/2018. Half way down the first page it states they will release a new procedure in 1st quarter of 2019 and do NOT replace any parts at this time or the dealer may be charged for them. It does seem to say that a second flush might be needed, I will see what my dealer says.
Jim
11-22-2018, 07:19 PM
#830
Burning Brakes
John
11-26-2018, 09:28 AM
#831
Drifting
My 2016 z51 started acting up this weekend. Been using the Range device since 4-5k miles and now at 12500 noticed some jerking. Took Range out and is terrible once v4 mode enables. Looks like its back to the dealer possibly, or just live with it for a few more months. Trading it next year at some point anyway.
11-26-2018, 11:18 AM
#832
Burning Brakes
My 2016 z51 started acting up this weekend. Been using the Range device since 4-5k miles and now at 12500 noticed some jerking. Took Range out and is terrible once v4 mode enables. Looks like its back to the dealer possibly, or just live with it for a few more months. Trading it next year at some point anyway.
11-26-2018, 03:20 PM
#833
Drifting
I didn't try it yet with the paddles. Even with the Range plugged in you can tell it jerks on accelleration. Allowing it into v4 mode without Range it is pretty bad. Ill give the paddles a shot and see how it works on slight speed up. Guess i'll call the dealership and see if they even have a clue about this situation in my area.
11-26-2018, 04:34 PM
#834
Burning Brakes
I didn't try it yet with the paddles. Even with the Range plugged in you can tell it jerks on accelleration. Allowing it into v4 mode without Range it is pretty bad. Ill give the paddles a shot and see how it works on slight speed up. Guess i'll call the dealership and see if they even have a clue about this situation in my area.
Ended up having the flush done at dealer 3 miles from the house. They were up front right away, explained the procedure, and so far have not had any shudder/vibration since it was done 4 months ago.
Dont have the Range device (yet) and a little concerned you are having the problem even with the Range in yours.
11-26-2018, 04:53 PM
#835
Drifting
When I talked to my selling dealer (bought my 2016 Z51 with 19K miles last January) they acted dumb at first-didn’t acknowledge there was a problem until I mentioned I had read about it on this Forum. Service writer next to the guy I was talking to then talked to me about the procedure - first flush, then convertor if necessary.
Ended up having the flush done at dealer 3 miles from the house. They were up front right away, explained the procedure, and so far have not had any shudder/vibration since it was done 4 months ago.
Dont have the Range device (yet) and a little concerned you are having the problem even with the Range in yours.
11-28-2018, 08:47 AM
#837
Drifting
My 16 Z51 goes in for it next Monday. Hoping it fixes mine also. Im sure it will resurface tho from what everyone says, still holding out for the new "fix" coming early 19
11-28-2018, 08:43 PM
#838
1st Gear
The following 4 users liked this post by Ikeman:
12-06-2018, 09:26 AM
#839
Drifting
Picked my '16 Z51 up from the flush last night. Problem is just as bad as before the flush, as i knew new fluid rarely fixes anything. Guess I'm gonna call them back today and see what the next step will be.
12-06-2018, 10:48 AM
#840
Burning Brakes
I also have the same problem, dealer flushed mine about a month ago and the problem is just as bad as before. They do say to put a few hundred miles on the car after the fluid change to see if the problem is resolved. GM will release a new procedure to fix the problem early next year so I guess I just wait until then and see what they say. No one is 100% sure what the new procedure will be but my money is on a new style torque convertor, time will tell.........
Last edited by MA ZO6; 12-06-2018 at 10:49 AM.