Is the automatic transmission in the Z06 that bad?
#1
Heel & Toe
Thread Starter
Is the automatic transmission in the Z06 that bad?
I currently own a 2018 RS3 and I am thinking in the next year or so to upgrade to a Corvette Z06 Convertible.
Now I would prefer a manual transmission but since my wife would like to drive it sometimes, then I might have to get the auto tranny.
With that said,
I watched this video today and was really put off by what the guy is saying:
The clickiness which makes the paddles sound very cheap but more importantly is how slow it upshifts or downshifts, that's a show stopper for me.
Is that really how bad the Auto is in these Corvettes or have they been improved for 2018 onwards?
I asked my friend who is a Corvette enthusiast and owned many Corvettes before and what he said is just leave the car in Auto and don't use the paddle shifters and you'd get the fastest 0-60 times with the best acceleration so I'm really confused here.
Now I would prefer a manual transmission but since my wife would like to drive it sometimes, then I might have to get the auto tranny.
With that said,
I watched this video today and was really put off by what the guy is saying:
The clickiness which makes the paddles sound very cheap but more importantly is how slow it upshifts or downshifts, that's a show stopper for me.
Is that really how bad the Auto is in these Corvettes or have they been improved for 2018 onwards?
I asked my friend who is a Corvette enthusiast and owned many Corvettes before and what he said is just leave the car in Auto and don't use the paddle shifters and you'd get the fastest 0-60 times with the best acceleration so I'm really confused here.
Popular Reply
06-15-2018, 07:27 PM
Race Director
First off...that guy is another one of those internet douche canoes......
Second off....it's personal preference....
/thread
Second off....it's personal preference....
/thread
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#4
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Here's a better review of both the M7 and A8.
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Super Spartan (06-15-2018)
#6
Heel & Toe
Thread Starter
#7
Drifting
I own an M7 and while I'd personally never want an auto, I drove an A8 stingray on vacation last year that had ZERO issues shifting. The car was solid and the transmission impressed me (for an auto). My M7 still has the paddles for turning on/off rev matching and I have never ONCE heard my paddles sound the way they do in that horrible idiots video.
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speedz06 (08-14-2022)
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Super Spartan (06-15-2018)
#9
Heel & Toe
Thread Starter
That's exactly what my Corvette enthusiast friend told me. He said to leave it in Auto and enjoy it and not to bother with the shift paddles.
#10
BMW programs their automatics for a fast 1-2 shift in manual mode with the paddles. So people think the BMW autos are different than the Corvette. It’s the same and lags just the same as my Vette. I think the auto in the Vette is awesome, when your aggressive it’s aggressive. When your relaxed it’s relaxed.
#12
Drifting
I've had paddles in my last three vettes... and LOVE them. Don't get where people are saying to keep it in Auto.. that's the one place I've never been. I don't have any qualms about them and since they (GM) are going to be doing away with the stick, looking forward to many more years of "paddling" down the highway..
Last edited by azcanuk; 06-15-2018 at 10:10 PM.
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RODXL1200 (06-18-2018)
#13
Team Owner
#14
Team Owner
I've had paddles in my last three vettes... and LOVE them. Don't get where people are saying to keep it in Auto.. that's the one place I've never been. I don't have any qualms about them and since they (GM) are going to be doing away with the stick, looking forward to many more years of "paddling" down the highway..
#15
Le Mans Master
I have had the A8 in a 15,16 and 18 Z06. No problems at all.
#16
Drifting
I agree on the "D" if you're "competing" but for everyday driving I'm in "M" mode all the time...
Put it in "D", pull the down shift paddle until it hits the lowest gear it'll shift to then away you go!!!
Last edited by azcanuk; 06-16-2018 at 11:28 AM.
#17
Drifting
After living with stick shift cars all my life, I have to say that I love my A8. ZR-1s, Hemi Roadrunner, E-Type Jags, Pantera, Ferrari, Austin Healey, all were great cars with their manual transmissions. But I now really enjoy the automatic in the Z06. Around town I often use the paddle shifters because I like the sound of the car with them combined with a loud exhaust setting and both Tour and Sport settings. If the wife is with me, I switch to Drive, Tour and Auto exhaust settings. When I travel on the highway I use Drive, Tour and a quiet exhaust setting. A great and pleasant touring car, and it you need it, almost instant response of power. I would say the auto is not perfect and there can be an occasional bit of clunkiness in the shifting but overall it is a fine enjoyable transmission and no problems with it in 12,000 miles. --Bob
Last edited by ZR1Bob; 06-16-2018 at 11:42 AM.
#18
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The A8 even has some advantages over a Dual Clutch Transmission, in that it can execute most upshifts without needing to interrupt engine power.
Last edited by Warp Factor; 06-16-2018 at 12:37 PM.
#19
Mine has been fine (2016 Z06, March 2016 build).
I have a Range anti-AFM module in mine so it never goes into V4 mode whether it is in automatic or manual. You will see a lot of torque converter issues with the 8L90 (aka A8) transmissions in multiple platforms because of what GM does with the powertrain control in V4 mode. Operating on half its native number of cylinders there is not surprisingly a lot more engine vibration and in V4 mode the converter lock up clutch is continuously modulated on and off between its locked and unlocked states to allow the torque converter to absorb some of the vibration. The downside to this is an obvious increase in wear that occurs from continuous cycling of the clutch. Ultimately this results in RPM variation at steady cruising speed due to lockup clutch wear progressing to shudder (feels like the vehicle is running over rumble strips) as the wear gets worse.
This is a much bigger problem in non-Z06 Corvettes which spend far more time in V4 mode. Even without a Range module or not driven in manual mode (either of which prevents V4 operation) a Z06 rarely drops into 4 cylinder mode due to its greater wind drag and lower base compression ratio of its supercharged engine. But I am not taking any chances with this poor design choice which was right up there with specifying the same radiator and coolant system capacity for the LT1 and LT4 engines.
The only other advice I have with the 8L90 is at least through 2016 it has an issue with initial slow fill of the C4 clutch pack actuator for the very first 1 to 2 shift of the day. This can result in a harsh initial upshift on the first shift to second but an easy work around is with the car still stationary drop it into manual mode, paddle shift to 2, then either put it back in drive or shift to 1 and drive as you normally would. Once the initial hydraulic actuator fill takes place this won't be an issue again until after parking it overnight. GM may have updated the software by now to do a partial pre-fill of this actuator at initial start but if not this work around is simple and it works fine.
I am very happy with the 8L90 but not pleased that avoiding V4 mode is not user selectable like it is with manual transmission Corvettes or A8 units intended for export. One of the deciding factors for me in replacing my 2006 GMC diesel pickup with another diesel instead of a gas light duty pickup was I don't want anything else with this Rube Goldberg AFM/V4 scheme.
I have a Range anti-AFM module in mine so it never goes into V4 mode whether it is in automatic or manual. You will see a lot of torque converter issues with the 8L90 (aka A8) transmissions in multiple platforms because of what GM does with the powertrain control in V4 mode. Operating on half its native number of cylinders there is not surprisingly a lot more engine vibration and in V4 mode the converter lock up clutch is continuously modulated on and off between its locked and unlocked states to allow the torque converter to absorb some of the vibration. The downside to this is an obvious increase in wear that occurs from continuous cycling of the clutch. Ultimately this results in RPM variation at steady cruising speed due to lockup clutch wear progressing to shudder (feels like the vehicle is running over rumble strips) as the wear gets worse.
This is a much bigger problem in non-Z06 Corvettes which spend far more time in V4 mode. Even without a Range module or not driven in manual mode (either of which prevents V4 operation) a Z06 rarely drops into 4 cylinder mode due to its greater wind drag and lower base compression ratio of its supercharged engine. But I am not taking any chances with this poor design choice which was right up there with specifying the same radiator and coolant system capacity for the LT1 and LT4 engines.
The only other advice I have with the 8L90 is at least through 2016 it has an issue with initial slow fill of the C4 clutch pack actuator for the very first 1 to 2 shift of the day. This can result in a harsh initial upshift on the first shift to second but an easy work around is with the car still stationary drop it into manual mode, paddle shift to 2, then either put it back in drive or shift to 1 and drive as you normally would. Once the initial hydraulic actuator fill takes place this won't be an issue again until after parking it overnight. GM may have updated the software by now to do a partial pre-fill of this actuator at initial start but if not this work around is simple and it works fine.
I am very happy with the 8L90 but not pleased that avoiding V4 mode is not user selectable like it is with manual transmission Corvettes or A8 units intended for export. One of the deciding factors for me in replacing my 2006 GMC diesel pickup with another diesel instead of a gas light duty pickup was I don't want anything else with this Rube Goldberg AFM/V4 scheme.
Last edited by NSC5; 06-16-2018 at 12:19 PM.
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Super Spartan (06-16-2018)
#20
Advanced
I came to the forums trying to figure out whether to go M7 or A8 before ordering mine. The best thing I read was if you can test drive each. Well I found a dealership willing to let me test drive each. I took the A8 out came back and told him I no longer needed to test the manual because I won’t be getting it an auto. Again, just all comes down to personal preference. Same thing with the competition seats, so glad I sat in them before ordering them just because they look cool.