Fineride

I went with the A6 transmission this time on my new to me 2008 Coupe. I've owned a couple of MN6 in the past and just felt like an automatic would be a nice change. I liked the A6 on the test drive and for the most part it is smooth but after driving it for a few weeks, I now notice a slight shudder when lifting off the throttle at cruising speeds. It's not from downsifting so I assume the torque converter lockup is doing something. It's not terrible but I'm curious if anyone knows of a programming update to address this. It appears this issue has been mentioned a couple of times by others on this site but I don't see any mention of a resolution. I know on the new Chevy Malibu, they had a similar problem which the GM engineers described as lock up converter chuggle. On that car they did make some transmission programming changes to address numerous owner complaints. I'm going to check with my dealer at the next service visit but would like to hear from others that know about this issue and any possible remedy. Other than that issue, I'm enjoying the car and all smiles.

Robert Chicoine

I have an 09 A6 that does the same thing as you described, not a serious issue but a little annoying. Does anyone know if there is a fix?

BornSUPERCHARGED

Some have said there is a "software upgrade for improved torque management for the A6".

Here's an example thread, but no resolution. Just some speculation it could be the torque convert or that the software upgrade could fix it:
http://forums.corvetteforum.com/c6-c...n-shudder.html

ramilian

Mine does the same thing.

Robert Chicoine

Thanks for the response gentleman, it seems that it is fairly common with the A6, and decel enleanment could be the culprit, but root cause still not found.

DOUG @ ECS

Besides enhancing the performance of the shifts, our hand held programmer also addresses the issue you guys are discussing.

There are several threads regarding the tunes in C6 scan and tune section. Hope that helps.



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Robert Chicoine

Well Doug, it seems I just may have to order your hand held tuner.

One question, after I upload the existing stock program and e-mail it to you, is the car driveable?

TLTONEY

Yep. I sent my stock tune and drove the car without issue until my new tune was sent back to be uploaded.

S'vette

All you are doing is copying the file to send to him, just like a copy on a computer. The tune does make a difference. Now my car is alot more of a beast and I have to be careful about breaking the rear tires loose at times.

Sent you a msg via Yahoo Doug.

Robert Chicoine

Thanks for the response, are you guys completely satisifed with your results with the transmission changes, does it shift noticably harder?
How long was turn around on the e-mail tune?


Doug, I did not receive a message via Yahoo.

TLTONEY

It shifts almost like stock while in drive under light/part throttle. When you feed the beast, it shifts good and firm (spins the tires on the 1-2 shift). When you put it in "S", it holds gears longer, down shifts quicker, and shifts firmer.
It is well worth the money to get the transmission tune.

paganharley

I just put the tune in from ECS last week. I have a 05. It really made a big difference. 1st to second have to be careful it wants to break loose when you are on it. Also have had it break loose hitting 3rd also. Doug will do you right.

Robert Chicoine

Thanks again for the input, looks like I will be calling ECS very soon.

Gearhead Jim

Our 2009 A6 also has the "stutter" when letting off the throttle around 60 mph. It could be in the ECM programming, most of the 2008-2009 LS3's (maybe 2010-11 but I don't know) don't want to take light throttle. Several people have mentioned that if you are idling in neutral, it's not possible to add small amounts of throttle and increase the rpm by 100-200 at a time; it just jumps right up to over 1,000 rpm.

I can live with the stutter, but a cure would be nice.

MisterMidlifeCrisis

My 2011 does the same thing. It's pretty minor, feels like an engine stumble but even when it is doing this, it'll take throttle with no hesitation so I just take it as being the personality of the car.