Getting concerned-A8 issues?
Melting Slicks
Joined: May 2001
Posts: 2,596
Likes: 120
From: East Tennessee
I have been reading quite A bit on here with the A8.It seems there are problems with the jolt
With the shifting.1-2. Or 2-1.Some say it's A software issue.Supposely the dealer can take care of it.It reminds me of the automatics that had shift kits put in.They would shift hard on
Purpose.
I have an M7.I believe if I had an A8 I would like it to shift hard and fast.
With the shifting.1-2. Or 2-1.Some say it's A software issue.Supposely the dealer can take care of it.It reminds me of the automatics that had shift kits put in.They would shift hard on
Purpose.
I have an M7.I believe if I had an A8 I would like it to shift hard and fast.
Burning Brakes
Joined: Apr 2015
Posts: 1,056
Likes: 277
From: Chattanooga, TN
here's the bulletin in case anyone is still looking for it: https://www.corvetteforum.com/forums...a-oct-2014.pdf
pretty interesting!!
pretty interesting!!
Thread Starter
Le Mans Master
Joined: Sep 2012
Posts: 7,146
Likes: 1,940
From: Hagerstown MD
St. Jude Donor '15-'16,'18
here's the bulletin in case anyone is still looking for it: https://www.corvetteforum.com/forums...a-oct-2014.pdf
pretty interesting!!
pretty interesting!!
Team Owner
Joined: Mar 2004
Posts: 30,055
Likes: 351
From: Big Red Ne
Used my C7 today to run some errands. Beautiful sunny day with temps in the mid 50s. I noted several rough 1-2 shifts and a couple very rough jolts when putting the car in D. Car just turned over 3200 miles. I hadn't planned to visit a dealer before my first oil change which won't be due until probably June or July. Advice?
Melting Slicks
Joined: Mar 2013
Posts: 3,104
Likes: 626
From: Baton Rouge LA
I had the hard 2-1 or 3-1 shift twice early on, but that disappeared, probably due to adaptive learning. Never had a hard upshift as many have reported, but did have a lag going into reverse when cold about once or twice every three months. Had the newest software update with "fast learn" done last month and can't tell much difference in everyday operation, which is a good thing. The lag has not yet returned, and time will tell on that, but I can't complain about the A8 so far and hope it just continues to perform as well as it is now.
I had some trepidation buying the A8 in the first place, as all cars I've owned in the past 35 years have been manuals. I switched this time because I think seven speeds is at least one gear too many for a manual, the A8 should out-perform the M7, and offers ideal gear placement without aforethought by just mashing the pedal. Highway mileage is better than my C6 M6 and about the same in city driving. The only drawback I see is that I really do like to shift, but my DD is a manual and that is sufficient exposure for the time being. Next time? I don't know yet, but the $1800 surcharge is a big deterrent, and if I'm on the fence it will favor the manual.
I had some trepidation buying the A8 in the first place, as all cars I've owned in the past 35 years have been manuals. I switched this time because I think seven speeds is at least one gear too many for a manual, the A8 should out-perform the M7, and offers ideal gear placement without aforethought by just mashing the pedal. Highway mileage is better than my C6 M6 and about the same in city driving. The only drawback I see is that I really do like to shift, but my DD is a manual and that is sufficient exposure for the time being. Next time? I don't know yet, but the $1800 surcharge is a big deterrent, and if I'm on the fence it will favor the manual.
Last edited by iclick; Dec 12, 2015 at 01:52 PM.
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
I've driven a lot of automatic transmission cars over that past 58 years. From soft shifting mundane cars to hard shifting performance cars.
Why do we need a transmission that "learns"? Just engineer it with a button on the dash that has default mode for soft shifting and when you press the button, it shifts hard.
Why do we need a transmission that "learns"? Just engineer it with a button on the dash that has default mode for soft shifting and when you press the button, it shifts hard.
Last edited by JoesC5; Dec 12, 2015 at 01:45 PM.
Drifting
Joined: May 2015
Posts: 1,412
Likes: 140
here's the bulletin in case anyone is still looking for it: https://www.corvetteforum.com/forums...a-oct-2014.pdf
pretty interesting!!
pretty interesting!!
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Drifting
Joined: Jul 2007
Posts: 1,454
Likes: 4
From: Massapequa NY
That tsb procedure is for earlier built A8's Newer versions can be done with the tech 2 tool no driving of the car needed. I believe the cut off was December of 14 time frame. If you search the forum you can probably find the thread. Hope this helps you guys with a8's
Thread Starter
Le Mans Master
Joined: Sep 2012
Posts: 7,146
Likes: 1,940
From: Hagerstown MD
St. Jude Donor '15-'16,'18
Hopefully performing the old procedure on my '16 won't make it worse.
Instructor
Joined: Nov 2015
Posts: 236
Likes: 50
I've driven a lot of automatic transmission cars over that past 58 years. From soft shifting mundane cars to hard shifting performance cars.
Why do we need a transmission that "learns"? Just engineer it with a button on the dash that has default mode for soft shifting and when you press the button, it shifts hard.
Why do we need a transmission that "learns"? Just engineer it with a button on the dash that has default mode for soft shifting and when you press the button, it shifts hard.
Safety Car
Joined: Mar 2014
Posts: 4,482
Likes: 668
From: Kilmarnock Va
I had the hard 2-1 or 3-1 shift twice early on, but that disappeared, probably due to adaptive learning. Never had a hard upshift as many have reported, but did have a lag going into reverse when cold about once or twice every three months. Had the newest software update with "fast learn" done last month and can't tell much difference in everyday operation, which is a good thing. The lag has not yet returned, and time will tell on that, but I can't complain about the A8 so far and hope it just continues to perform as well as it is now.
I had some trepidation buying the A8 in the first place, as all cars I've owned in the past 35 years have been manuals. I switched this time because I think seven speeds is at least one gear too many for a manual, the A8 should out-perform the M7, and offers ideal gear placement without aforethought by just mashing the pedal. Highway mileage is better than my C6 M6 and about the same in city driving. The only drawback I see is that I really do like to shift, but my DD is a manual and that is sufficient exposure for the time being. Next time? I don't know yet, but the $1800 surcharge is a big deterrent, and if I'm on the fence it will favor the manual.
I had some trepidation buying the A8 in the first place, as all cars I've owned in the past 35 years have been manuals. I switched this time because I think seven speeds is at least one gear too many for a manual, the A8 should out-perform the M7, and offers ideal gear placement without aforethought by just mashing the pedal. Highway mileage is better than my C6 M6 and about the same in city driving. The only drawback I see is that I really do like to shift, but my DD is a manual and that is sufficient exposure for the time being. Next time? I don't know yet, but the $1800 surcharge is a big deterrent, and if I'm on the fence it will favor the manual.
About the 7th gear on the M7.You never need to use it.I use it to help
With gas mileage on A trip.
Racer
Joined: Aug 2007
Posts: 354
Likes: 101
From: Louisville Ky
I know a lot of people get defensive if anything is said about a C7 but these A8 transmission issues are not normal and GM needs to straighten this mess out.
Thread Starter
Le Mans Master
Joined: Sep 2012
Posts: 7,146
Likes: 1,940
From: Hagerstown MD
St. Jude Donor '15-'16,'18
hoping that it's actually a very small number. I do know that I followed the GM guidance exactly as far as break in procedures and "training" the tranny to shift according to my driving style. One question: is the shifting supposed to vary with the various drive modes, i.e. Tour, Sport, etc?
Safety Car
Joined: Sep 2001
Posts: 4,495
Likes: 1,263
From: Jacksonville FL
It appears some of the transmission problems with the A8 start around 10K, bad torque converters etc, and many on the form with the A8's have not reached the 10K yet. These C-7 owners are not having any problems with their A8's and don't like others being critical of the A8. I also couldn't understand it until my A8 at 11K miles started to shudder, bog down and lurch when you least expect it. My 2015 was built October 28, 2014.
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
It appears some of the transmission problems with the A8 start around 10K, bad torque converters etc, and many on the form with the A8's have not reached the 10K yet. These C-7 owners are not having any problems with their A8's and don't like others being critical of the A8. I also couldn't understand it until my A8 at 11K miles started to shudder, bog down and lurch when you least expect it. My 2015 was built October 28, 2014.His first 2015 C7 A8 puked it's transmission at 4 miles. He refused to take the car and GM installed a new transmission in that car and put it back on the dealer's showroom floor. His second C7 puked it's transmission at 1200 miles and GM replaced the transmission, and when that new transmission started having problems just a couple of months later, GM put him in a new 2016. So far, but with few miles on the odometer, the 2016 is working okay.
Last edited by JoesC5; Dec 13, 2015 at 01:05 PM.
Thread Starter
Le Mans Master
Joined: Sep 2012
Posts: 7,146
Likes: 1,940
From: Hagerstown MD
St. Jude Donor '15-'16,'18
[QUOTE=JoesC5;1591104493]A friend's A8 history.
His first 2015 C7 A8 puked it's transmission at 4 miles. He refused to take the car and GM installed a new transmission in that car and put it back on the dealer's showroom floor. His second C7 puked it's transmission at 1200 miles and GM replaced the transmission, and when that new transmission started having problems just a couple of months later, GM put him in a new 2016. So far, but with few miles on the odometer, the 2016 is working okay.[/QUOTE
I hope your friend is luckier this time with his '16. Does he drive his cars hard?
His first 2015 C7 A8 puked it's transmission at 4 miles. He refused to take the car and GM installed a new transmission in that car and put it back on the dealer's showroom floor. His second C7 puked it's transmission at 1200 miles and GM replaced the transmission, and when that new transmission started having problems just a couple of months later, GM put him in a new 2016. So far, but with few miles on the odometer, the 2016 is working okay.[/QUOTE
I hope your friend is luckier this time with his '16. Does he drive his cars hard?
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
[QUOTE=rmorin1249;1591105537]
No, as it's actually his wife's car. He's 74(we won't discuss his wife's age) and he has a little over 30,000 miles on his 2010 C6 GS A6 with zero transmission problems.
His DD is a Silverado and her DD is an Escalade. Both are retired. The Vettes don't get driven that much.
A friend's A8 history.
His first 2015 C7 A8 puked it's transmission at 4 miles. He refused to take the car and GM installed a new transmission in that car and put it back on the dealer's showroom floor. His second C7 puked it's transmission at 1200 miles and GM replaced the transmission, and when that new transmission started having problems just a couple of months later, GM put him in a new 2016. So far, but with few miles on the odometer, the 2016 is working okay.[/QUOTE
I hope your friend is luckier this time with his '16. Does he drive his cars hard?
His first 2015 C7 A8 puked it's transmission at 4 miles. He refused to take the car and GM installed a new transmission in that car and put it back on the dealer's showroom floor. His second C7 puked it's transmission at 1200 miles and GM replaced the transmission, and when that new transmission started having problems just a couple of months later, GM put him in a new 2016. So far, but with few miles on the odometer, the 2016 is working okay.[/QUOTE
I hope your friend is luckier this time with his '16. Does he drive his cars hard?
His DD is a Silverado and her DD is an Escalade. Both are retired. The Vettes don't get driven that much.
Last edited by JoesC5; Dec 13, 2015 at 05:15 PM.