A8 brutal shift
Thread Starter
Burning Brakes
Joined: Sep 2006
Posts: 931
Likes: 96
From: Canyon Country CA
A8 brutal shift
My A8 has a brutal shift into first after a stop. This occurs when warmed up, then stopping, then proceeding. The car does not initially move forward when applying throttle and then finally shifts to first with a loud bang.
Dealer installed "fast learn" software" which does not address this problem. I may take it back, but w/o a factory notice, I don't think they will anything.
Dealer installed "fast learn" software" which does not address this problem. I may take it back, but w/o a factory notice, I don't think they will anything.
Advanced
Joined: Apr 2015
Posts: 63
Likes: 13
From: Woodlands Tx
No problem
Just about all A8 auto goes thru this bang after coming to a slow stop... Mine's did it , the transmission is going thru a learning process ... It will stop after putting about 500 to 1000 miles , mines completely stop at about 800 miles.... 😎
Racer
Joined: Dec 2014
Posts: 294
Likes: 16
My A8 has a brutal shift into first after a stop. This occurs when warmed up, then stopping, then proceeding. The car does not initially move forward when applying throttle and then finally shifts to first with a loud bang.
Dealer installed "fast learn" software" which does not address this problem. I may take it back, but w/o a factory notice, I don't think they will anything.
Dealer installed "fast learn" software" which does not address this problem. I may take it back, but w/o a factory notice, I don't think they will anything.
Thread Starter
Burning Brakes
Joined: Sep 2006
Posts: 931
Likes: 96
From: Canyon Country CA
Completed 1/22/15 and delivered 2/26/15 at NCM. Has the only update for A8 that GM shows and it does not say that it addresses this issue, which it has not.
Dealer has no solution and does not seem to want to get GM involved since they cannot reproduce the failure. This is an issue when a dealer cannot duplicate a problem and there is no specific GM TSB for them to refer to.
This happens maybe 10% of the time. It does it in all modes except Winter since that starts off in a higher gear. When I told the dealer this, they said "well just drive it W all the time".
Dealer has no solution and does not seem to want to get GM involved since they cannot reproduce the failure. This is an issue when a dealer cannot duplicate a problem and there is no specific GM TSB for them to refer to.
This happens maybe 10% of the time. It does it in all modes except Winter since that starts off in a higher gear. When I told the dealer this, they said "well just drive it W all the time".
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Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
A friend is having this same problem with his Z51 A8 except it happens in reverse. He shifts into reverse, nothing happens, he gives it some gas and nothing happens, then he gets around 1500 RPM and it goes into reverse with a loud bang, and shoots backwards like being shot out of a canon.
This is his second A8 transmission on this particular car. The first car he was going to buy dumped the transmission(at 4 miles) when the salesman took it up the street to fill it with gas. My friend passed on that car, and waited for another car..
His wife refuses to drive the car, and it's her car(he has a C6 GS with the A6 which has been trouble free).
It's at the dealer now.
This is his second A8 transmission on this particular car. The first car he was going to buy dumped the transmission(at 4 miles) when the salesman took it up the street to fill it with gas. My friend passed on that car, and waited for another car..
His wife refuses to drive the car, and it's her car(he has a C6 GS with the A6 which has been trouble free).
It's at the dealer now.
Last edited by JoesC5; Sep 10, 2015 at 01:04 PM.
Melting Slicks
Joined: Mar 2013
Posts: 3,104
Likes: 626
From: Baton Rouge LA
Dealer installed "fast learn" software" which does not address this problem. I may take it back, but w/o a factory notice, I don't think they will anything.
Last edited by iclick; Sep 10, 2015 at 04:35 PM.
Melting Slicks
Joined: Mar 2013
Posts: 3,104
Likes: 626
From: Baton Rouge LA
A friend is having this same problem with his Z51 A8 except it happens in reverse. He shifts into reverse, nothing happens, he gives it some gas and nothing happens, then he gets around 1500 RPM and it goes into reverse with a loud bang, and shoots backwards like being shot out of a canon.
It's at the dealer now.
Last edited by iclick; Sep 10, 2015 at 04:40 PM.
Thread Starter
Burning Brakes
Joined: Sep 2006
Posts: 931
Likes: 96
From: Canyon Country CA
I have never shifted it into neutral and then back to drive b4 proceeding from a stop. Since it is supposed to be an automatic, why would anyone want or need to do this?
Also, isn't the trans supposed to shift into first after stopping with it in drive? You said if it does, it is a problem. I think just the opposite is true; if it doesn't shift into first after stopping is a problem.
Also, isn't the trans supposed to shift into first after stopping with it in drive? You said if it does, it is a problem. I think just the opposite is true; if it doesn't shift into first after stopping is a problem.
Melting Slicks
Joined: Mar 2013
Posts: 3,104
Likes: 626
From: Baton Rouge LA
Also, isn't the trans supposed to shift into first after stopping with it in drive? You said if it does, it is a problem. I think just the opposite is true; if it doesn't shift into first after stopping is a problem.
Melting Slicks
Joined: Jun 2013
Posts: 2,759
Likes: 470
From: Pittsburgh PA.
I have a 2016 Z06 and mine does this quite a bit. Usually when coming up to a stop light or stop sign. Not so much a loud noise but more of a hard hit going into first gear. Anybody have this problem???
Cruising
Joined: Jun 2015
Posts: 12
Likes: 1
From: Las Vegas Nevada
I'd like to hear if other folks are having the same issue. While in drive be sure the car is in 2 then slow to a stop. I'm betting it will be a harsh shift.
I took mine to the dealer and they flashed the trans but that didn't help. Gave me the BS story that is a high performance car and the A8 is doing its thing. WTF? Anyway, I'm giving it time to see if the A8 "adapts".
Let me know if anyone figures this one out. Brian
Le Mans Master
Joined: Sep 2003
Posts: 8,847
Likes: 795
From: Longview Texas
There are several other posts where people with the A8 have had the car feel like it stays in neutral when shifted into Drive, then the RPM increases on its own and the car slams into gear and takes off.
One guy said he started the car up after washing it in his driveway, put it in Drive, nothing, back to neutral then Drive, and the RPM shot up and slammed into gear almost running into the garage.
Glad I have 7 speed manual.
One guy said he started the car up after washing it in his driveway, put it in Drive, nothing, back to neutral then Drive, and the RPM shot up and slammed into gear almost running into the garage.
Glad I have 7 speed manual.