A6 trans downshift?
Racer
Joined: Dec 2006
Posts: 256
Likes: 0
From: Newburgh Indiana
When your A6 transmission was tuned , I suspect that the shifting response time was decreased and the clamping pressure was increased . At higher RPM's , when downshifting , it should feel hard or more solid . This may be what you are experiencing .
Melting Slicks
Joined: Jul 2007
Posts: 3,097
Likes: 5
From: Brentwood World's first A6 in the 9's (including N/A, blower, turbo and nitrous cars) 9.950@139.267 CA
I did a VE tune on my car last week (which requires you to disable the MAF) and what ends up happening is the PCM determines something is wrong and sets the transmission line pressure to full, basically in an attempt to alert the driver that something is wrong.
Who did the tune by the way?
Christopher
Safety Car
Joined: Aug 2006
Posts: 4,206
Likes: 6
From: Makena, Maui & NM
I thought you wanted WIPLASH with your A6? 
Well, apparently you got it.
I can only guess who is the tuner
All joking? aside, can you describe better what your problem is? Is this "hard" downshifting in paddle mode or while in D or S auto mode? Or are you having hard downshifts when you stomp on the throttle while cruising and "kick down" one or more gears while in D or S mode?
Well, apparently you got it. I can only guess who is the tuner All joking? aside, can you describe better what your problem is? Is this "hard" downshifting in paddle mode or while in D or S auto mode? Or are you having hard downshifts when you stomp on the throttle while cruising and "kick down" one or more gears while in D or S mode?
Race Director
Joined: Sep 2001
Posts: 11,907
Likes: 1
From: Between a rock and a hard place, S.E. PA
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Safety Car
Joined: Aug 2006
Posts: 4,206
Likes: 6
From: Makena, Maui & NM
Race Director
Joined: Sep 2001
Posts: 11,907
Likes: 1
From: Between a rock and a hard place, S.E. PA
Any good tuner would invest the time to help out a past customer. He/she should WANT to know if something is happening after a custom tune.
Remember, you have an adaptive transmission, so over time it makes adjustments of it's own to compensate for wear and tear. But I wouldn't waste anymore time, if you can't visit your tuner, at least call.
Melting Slicks
Joined: Jun 2006
Posts: 2,690
Likes: 1
From: Northern Calif
If it was fine for some time after the tune then look for something else other than the trans. I noticed in the avatar that the car is lowered. If so, you might want to look for something hitting like exhaust or ?? when the car is flexing on shifts. Just a thought.
Race Director
Joined: Sep 2001
Posts: 11,907
Likes: 1
From: Between a rock and a hard place, S.E. PA
Universal joints may knock if the drivetrain alignment is off. But it would feel more like a bouncing than a clunk. You'd get the clunk when you put it into gear and a wobble on deceleration.