M7
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Sep 13, 2021, 04:25 PM
Le Mans Master
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Burning Brakes
Joined: Oct 2004
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From: Bowmanville, Ontario, Canada
Yes it does have DOD / AFM. But with the M7 it only kicks in if you put it in 'Economy' mode. In 2 years I haven't done that with my 2019 M7 and never intend to!
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Instructor
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From: King, NC
Thanks. Why do they even put an economy mode on a Corvette. I hate to shift gears any more but I found out after I bought my automatic how much trouble some they are.
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Instructor
Joined: Jun 2021
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From: King, NC
I wish I had read all the posts I could on this forum before I bought my a8 c7. I am finally use to all the gadgets on the c7 but I have had so many problems with the drivetrain that I have don't have any faith in the car. An older lady owned the car and it must have went into v4 a lot. What I thought was transmission shudder, after the transmission fluid change turned out to be a bad torque tube. This was at 5400 miles. I think my best bet is to trade for a M7. The car only has 6k miles now. Thanks for the info.
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Joined: Sep 2010
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I wish I had read all the posts I could on this forum before I bought my a8 c7. I am finally use to all the gadgets on the c7 but I have had so many problems with the drivetrain that I have don't have any faith in the car. An older lady owned the car and it must have went into v4 a lot. What I thought was transmission shudder, after the transmission fluid change turned out to be a bad torque tube. This was at 5400 miles. I think my best bet is to trade for a M7. The car only has 6k miles now. Thanks for the info.
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Pro
Joined: May 2021
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From: Queen Creek, AZ
Do a little research. The M7 has it's issues, too. Once the AFM is eliminated with a Range unit or tuned out, the A8 has a pretty good track record. The issues with the M7 aren't resolved quite as easily.
Tech Contributor
Joined: Oct 1999
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From: Charlotte, NC (formerly Endicott, NY)
I wish I had read all the posts I could on this forum before I bought my a8 c7. I am finally use to all the gadgets on the c7 but I have had so many problems with the drivetrain that I have don't have any faith in the car. An older lady owned the car and it must have went into v4 a lot. What I thought was transmission shudder, after the transmission fluid change turned out to be a bad torque tube. This was at 5400 miles. I think my best bet is to trade for a M7. The car only has 6k miles now. Thanks for the info.
Bill
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Pro
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From: Queen Creek, AZ
Pro
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From: Queen Creek, AZ
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Yeah, and 99.99% of those problems (there are a few valve body problems) are as a result of the clutch shudder caused by the transmission fluid not the transmission. Generally, a triple flush solves that. You can't point a finger at the A8 because the wrong fluid was installed by GM. All things being equal, in a race, a programmed A8 will shift faster and out perform a manually shifted M7 every time. .
OUTPERFORMS THE M7 EVERY TIME BY GOD!! Well that changes everything!! They need to remove that sticky NOW !!!
p.s. 99.99% really? That’s some precision right there. Where did you get that statistic?
pss. I think A8s are just fine. I have one in my 2020 Silverado
Last edited by need-for-speed; Sep 14, 2021 at 02:33 PM.
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From: Atlanta GA
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