New C6 transmission problem
Thread Starter
Cruising
Joined: Jan 2005
Posts: 10
Likes: 0
New C6 transmission problem
My new C6 A6, with less than a thousand miles, intermittently, at speeds between 25 and 50, seems to forget to shift, revs high then pops into gear with a bang. The Dealer couldn't reproduce it but as soon as I took the car back it did it with a vengeance. Anybody have a similar experience?
Racer
Joined: Aug 2000
Posts: 300
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From: Ranch Cucamonga CA
Originally Posted by puckdoc
My new C6 A6, with less than a thousand miles, intermittently, at speeds between 25 and 50, seems to forget to shift, revs high then pops into gear with a bang. The Dealer couldn't reproduce it but as soon as I took the car back it did it with a vengeance. Anybody have a similar experience?
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Melting Slicks
Joined: Oct 2005
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From: Pasadena, CA
Originally Posted by lovecars
I had the same thing happen to mine once with about 650 miles in heavy traffic passing Memphis (it did not shift with a bang, though) while driving from the NCM to LA, I called a contact at GM Powertrain that I know and this person told me that it was the trans learning the car. Apparently the A6 has it's own computer in the pan and it learns the way it's driven. It's made this way because this trans will be installed in lots of trucks next year, starting with the large GM SUV's and GM doesn't want to install new computers to handle it, also there are no BIG external wiring harness except for three wires that go to the trans.
Safety Car
Joined: Oct 2002
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From: Austin TX
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St. Jude Donor '03-'04-'05
Is it going into performance shift mode? It automatically does this when it detects you are doing high speed cornering and rapid accel. It will keep it in a lower gear at higher rpms so you have better get-up-and-go as you exit the corner. Sometimes this is annoying.
Thread Starter
Cruising
Joined: Jan 2005
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Thanks for the input. I played around with it this afternoon. In the sports mode and paddle shifting its fine but it still occurs in sports mode if I don't paddle shift. The *** (Alzheimer Shift Syndrome) only occurs after the car is warmed up. The effect does seem to be getting worse, however. I'll take it back in on Monday after I drive it around for a while.
Drifting
Joined: Aug 2004
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Originally Posted by StanNH
Can I be the first to come up with an acronym for this? Oh, please!
***
Alzheimer Shift Syndrome.
***
Alzheimer Shift Syndrome.
It's not always fun getting old. 
Team Owner
Joined: Sep 2005
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From: Big Bend Country, TX
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15- '16-'17-‘18-‘19-'20-'21
NCM Lifetime Member
Originally Posted by lovecars
I had the same thing happen to mine once with about 650 miles in heavy traffic passing Memphis (it did not shift with a bang, though) while driving from the NCM to LA, I called a contact at GM Powertrain that I know and this person told me that it was the trans learning the car. Apparently the A6 has it's own computer in the pan and it learns the way it's driven. It's made this way because this trans will be installed in lots of trucks next year, starting with the large GM SUV's and GM doesn't want to install new computers to handle it, also there are no BIG external wiring harness except for three wires that go to the trans.
From the get go, I've made it a point to drive in "S" with the TCS in "Comp" mode. Yes, the transmission learns real fast. The more spirited your driving, the better and faster it will shift. 1560 miles in two weeks.
Le Mans Master
Joined: Sep 2005
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From: Central Florida. Black Sheep Squadron Member. 465 rwhp & 477 rwtq
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St. Jude Donor '07
Originally Posted by Jeffjett
1st A6 problem I have heard of. Keep us posted on your progress, and good luck.
Let us know how it turn out.
Race Director
Joined: Dec 2004
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From: Manhatten Beach, California
St. Jude Donor '05 thru '11,'18,'20,'21,'24,'25, '26
Originally Posted by puckdoc
My new C6 A6, with less than a thousand miles, intermittently, at speeds between 25 and 50, seems to forget to shift, revs high then pops into gear with a bang. The Dealer couldn't reproduce it but as soon as I took the car back it did it with a vengeance. Anybody have a similar experience?
