A8 Issues
Instructor
Joined: Mar 2015
Posts: 238
Likes: 50
From: FL
Did any of you guys that are having issues experience the 2-1 hard shift? I notice that my car does the 2-1 hard shift only when I drive my car hard, and does not go away until she sits for a long while, I just did the new update not to long ago and still the same.
The Gun Guy
Joined: Feb 2015
Posts: 28
Likes: 1
From: Montgomery TX
Did yours do this from day one or did it start doing it later? Mine didn't do it until I had it for a few months. Just curious.
Instructor
Joined: Feb 2005
Posts: 151
Likes: 140
now what...?
I'm supposed to take delivery of my new 2016 Z51 A8 car this weekend, and I'm stressing out about this TC problem...! Im going to call the dealer first thing tomorrow, and find out the build date. Only problem is, if it is an early 2016 build, what do i do? The loan is processed, checks have been sent, car is insured,...I basically Own the car, just haven't picked it up yet, and now i find out about this....!
Le Mans Master
Joined: Aug 2015
Posts: 8,243
Likes: 4,613
From: Southwest Florida
I'm supposed to take delivery of my new 2016 Z51 A8 car this weekend, and I'm stressing out about this TC problem...! Im going to call the dealer first thing tomorrow, and find out the build date. Only problem is, if it is an early 2016 build, what do i do? The loan is processed, checks have been sent, car is insured,...I basically Own the car, just haven't picked it up yet, and now i find out about this....!
Enjoy the moment...Enjoy your awesome new ride.
Those who did experience a TC problem encounter it when the car goes into V4 mode. That is why I only drive my A8 in manual/paddle shift mode and when I do put it in "D" (automatic) I have the AFM disabler installed so it never seems goes into V4 mode.
Safety Car
Joined: Sep 2001
Posts: 4,495
Likes: 1,263
From: Jacksonville FL
I'm supposed to take delivery of my new 2016 Z51 A8 car this weekend, and I'm stressing out about this TC problem...! Im going to call the dealer first thing tomorrow, and find out the build date. Only problem is, if it is an early 2016 build, what do i do? The loan is processed, checks have been sent, car is insured,...I basically Own the car, just haven't picked it up yet, and now i find out about this....!
Instructor
Joined: Feb 2005
Posts: 151
Likes: 140
Race Director
Joined: Mar 2010
Posts: 15,996
Likes: 821
I’m sorry to hear that you are experiencing an issue when your vehicle is shifting from 2-1. You mention that you’ve recently had an update done, so I’d be happy to reach out to your dealer in inquire further about your shifting concern.
If you’d like me to assist in this way, please send me a private message with your full contact info, VIN, current mileage, and the name of your involved dealer.
Have a great weekend,
Corey K.
Chevrolet Customer Care
Racer
Joined: Jan 2005
Posts: 418
Likes: 45
From: Houston Texas
My 2016 Z51 A8 built August 19, 2015 has very harsh shift when first shifting when driven after start up. Subsequent shifts are ok but first shift is always harsh. My guess is that the torque converter leaks down when the engine is off and the fluid has to repressure before shifts are normal. The 2016 has the auxiliary cooler up front under the front clip and that adds additional fluid that must repressure.
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Melting Slicks
Joined: Jun 2016
Posts: 2,845
Likes: 518
From: Eastern WA
Yes, and also a torque converter (transmission) was what was required because of the stupid AFM. The TC helps to dissipate much of that vibration that is caused from the transition from V8 to V4 and back.
I'm no expert and still learning, myself, but i believe the TC slip is computer controlled to "micro" slip when the AFM transition is made in order to absorb some of the vibrations. A DCT is not able to do this, thus the requirement for a classic torque converter auto.
This is a great transmission, all issues aside. It shifts in auto faster than a dual clutch, even though technically speaking there are alot of similarities between a DCT and this 8L90 that it shifting as fast, or faster, shouldn't be a surprise to anyone.
I'm no expert and still learning, myself, but i believe the TC slip is computer controlled to "micro" slip when the AFM transition is made in order to absorb some of the vibrations. A DCT is not able to do this, thus the requirement for a classic torque converter auto.
This is a great transmission, all issues aside. It shifts in auto faster than a dual clutch, even though technically speaking there are alot of similarities between a DCT and this 8L90 that it shifting as fast, or faster, shouldn't be a surprise to anyone.
Safety Car
Joined: Jan 2005
Posts: 4,500
Likes: 1,449
From: Pittsburgh PA
2025 C8 Stingray of the Year Finalist - Unmodified
2024 C8 of the Year Finalist - Unmodified
Originally Posted by Maxie2U
My 2016 was built on 10/15, wonder how I find out if I actually have the revised tranny or the previous (trouble plagued) revision?
You need your car's exact build date which you can get from Chevy Cust Service with your VIN. The engineering change was implemented 10/28/2015 per TSB #16-NA-014.
http://www.corvetteactioncenter.com/...-off-1290.html
My 2016 was built on 10/15, wonder how I find out if I actually have the revised tranny or the previous (trouble plagued) revision?
http://www.corvetteactioncenter.com/...-off-1290.html
Le Mans Master
Joined: Aug 2015
Posts: 8,243
Likes: 4,613
From: Southwest Florida
Originally Posted by Maxie2U
My 2016 was built on 10/15, wonder how I find out if I actually have the revised tranny or the previous (trouble plagued) revision?
You need your car's exact build date which you can get from Chevy Cust Service with your VIN. The engineering change was implemented 10/28/2015 per TSB #16-NA-014.
http://www.corvetteactioncenter.com/...-off-1290.html
My 2016 was built on 10/15, wonder how I find out if I actually have the revised tranny or the previous (trouble plagued) revision?
You need your car's exact build date which you can get from Chevy Cust Service with your VIN. The engineering change was implemented 10/28/2015 per TSB #16-NA-014.
http://www.corvetteactioncenter.com/...-off-1290.html
Safety Car
Joined: Jan 2005
Posts: 4,500
Likes: 1,449
From: Pittsburgh PA
2025 C8 Stingray of the Year Finalist - Unmodified
2024 C8 of the Year Finalist - Unmodified
Melting Slicks
Joined: Jun 2016
Posts: 2,845
Likes: 518
From: Eastern WA
Melting Slicks
Joined: Jun 2016
Posts: 2,845
Likes: 518
From: Eastern WA
Yes, and also a torque converter (transmission) was what was required because of the stupid AFM. The TC helps to dissipate much of that vibration that is caused from the transition from V8 to V4 and back.
I'm no expert and still learning, myself, but i believe the TC slip is computer controlled to "micro" slip when the AFM transition is made in order to absorb some of the vibrations. A DCT is not able to do this, thus the requirement for a classic torque converter auto.
This is a great transmission, all issues aside. It shifts in auto faster than a dual clutch, even though technically speaking there are alot of similarities between a DCT and this 8L90 that it shifting as fast, or faster, shouldn't be a surprise to anyone.
I'm no expert and still learning, myself, but i believe the TC slip is computer controlled to "micro" slip when the AFM transition is made in order to absorb some of the vibrations. A DCT is not able to do this, thus the requirement for a classic torque converter auto.
This is a great transmission, all issues aside. It shifts in auto faster than a dual clutch, even though technically speaking there are alot of similarities between a DCT and this 8L90 that it shifting as fast, or faster, shouldn't be a surprise to anyone.
