More transmission shudder news
10-25-2018, 11:36 AM
#41
10-25-2018, 12:58 PM
#42
Le Mans Master
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Location: Down south in Dixie
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10-25-2018, 01:59 PM
#44
Safety Car
I have seen other people complain about the A8.GM was replacing the TQ.My bet they are starting to lose money so they are going to stop replacing them if they can get away with it
10-25-2018, 02:11 PM
#45
Instructor
I'm more inclined to believe they are looking for a "one and done" fix. Many people have had multiple flushes and TC replacements and my guess is that GM wants a fix that will be permanent so they can cut their losses.
I understand they may have come up with a fix for the torque converters in their lighter duty vehicles and I'm hoping in the first Quarter of 2019 the fix will be ready for the TCs in the high performance vehicles such as our corvettes.
I understand they may have come up with a fix for the torque converters in their lighter duty vehicles and I'm hoping in the first Quarter of 2019 the fix will be ready for the TCs in the high performance vehicles such as our corvettes.
10-25-2018, 02:41 PM
#46
Knowing GM it will be a letter saying Dear Customer The A8 transmission is a very advanced transmission and all the terrible things you imagine its doing is how its supposed to operate and is "Performing as designed". GM will say just about anything not to have to pay for proper repairs.
10-25-2018, 02:58 PM
#47
Instructor
I feel it isn't the transmission per se but the implementation of AFM in an effort to increase average CAFE mileage. Pulsing the torque converter along with cylinder deactivation was a stupid way to go. The only real fix currently available is the Range device. It is beyond me why a Corvette owner would take a chance in running their car in V4 mode at all.
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Mike Mercury (10-25-2018)
10-25-2018, 03:20 PM
#48
Burning Brakes
If you read the service manual it indicates that the TC
is still being modulated even when not in V4 (AFM) mode.
Toward the end of the automatic transmission section
under description of operation.
is still being modulated even when not in V4 (AFM) mode.
Toward the end of the automatic transmission section
under description of operation.
10-25-2018, 03:32 PM
#49
Burning Brakes
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NSC5 (10-25-2018)
10-25-2018, 04:31 PM
#51
Team Owner
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10-25-2018, 04:34 PM
#52
Team Owner
I feel it isn't the transmission per se but the implementation of AFM in an effort to increase average CAFE mileage. Pulsing the torque converter along with cylinder deactivation was a stupid way to go. The only real fix currently available is the Range device. It is beyond me why a Corvette owner would take a chance in running their car in V4 mode at all.
10-25-2018, 05:13 PM
#53
Burning Brakes
I believe that the A6 had a larger more robust converter.
The A8 has what is known as a ‘squashed’ smaller converter so it would fit.
And it appears that it’s taking a beating.
The A8 has what is known as a ‘squashed’ smaller converter so it would fit.
And it appears that it’s taking a beating.
10-25-2018, 06:54 PM
#54
Le Mans Master
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St. Jude Donor '15-'16,'18
10-25-2018, 07:42 PM
#55
Team Owner
and with all the documented problems with the A8 it amazes me people still gotta have one....well don't say you weren't warned.
Good luck OP, I hope a solution is found right quick for you.
10-25-2018, 08:57 PM
#56
Burning Brakes
yup, mine too....and I love it when people say "stay away from first year models".
and with all the documented problems with the A8 it amazes me people still gotta have one....well don't say you weren't warned.
Good luck OP, I hope a solution is found right quick for you.
and with all the documented problems with the A8 it amazes me people still gotta have one....well don't say you weren't warned.
Good luck OP, I hope a solution is found right quick for you.
10-25-2018, 09:33 PM
#57
Race Director
Please get over the 6spd is better nonsense
it isn't. Period.
my bet is a software upgrade to stop the pulsing of the clutch. And problem solved.
and for the M7 guys... go away. No.. I dont want one. If I did I'd have one.
it isn't. Period.
my bet is a software upgrade to stop the pulsing of the clutch. And problem solved.
and for the M7 guys... go away. No.. I dont want one. If I did I'd have one.
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blue max (10-26-2018)
10-25-2018, 09:38 PM
#58
Team Owner
Software upgrade, yeah, that's the solution.
How about some hopes and prayers while you're at it....maybe change the bumper fluid, yeah, that's the problem, change the bumper fluid. 
Last edited by themonk; 10-25-2018 at 09:41 PM.
10-25-2018, 09:57 PM
#59
Burning Brakes
Maybe the A6 doesn’t shift as fast as the A8 but it doesn’t shudder requiring triple flushes and torque converter replacements on cars with less than 10k miles. If this fix was as simple as a software update don’t you think they would have done that long ago instead of wasting tons of money on triple flushes and torque converter replacements. AFM technology took a pretty good transmission and made it unreliable.
