Raffman55

2011 Grandsport with the A-6 automatic trans. So I've done a couple short course autocrosses with no real trans issues. However I tried a road course and experienced the shift flair when trying to shift near redline and discovered it would shift on it's own and then not shift when commanded. This is in Sport mode with paddles activated. Had a tuner firm up the shifts and checked trans fluid which was a little low so topped it off then added an extra quart. Shifted firm and felt great. Went to a Long course Autocross this weekend and trans doesn't flair anymore but still am not in command of the trans. It holds first gear for the first couple coroners but then shifts to second on its own and it takes several attempts to downshift back to first. On a long straight trying to shift up near redline I had to back off to get it to shift, lost a lot of time ! Going to try the fast relearn this week and see if that helps but is there anything else that can be done or is the auto trans just not suited for this ?

jaredtxrx

I don't know a whole lot about the C6 automatics but do you have any type of transmission fluid cooler? I wouldn't think a short autoX would get the temps too high but like I said, I don't know much about the autos.

Raffman55

Just the factory pass thru radiator. I did just order a Dewitts. I was checking trans temps and although hot nothing alarming

DigitalWidgets

I've autocrossed my 2011 GS A6 about 2 weekends per month since I bought it in 2010. I had no issues till 2016 (90K miles and thousands of autocross laps) when it did start to slip a bit. I did a trans fluid flush and refill and the problem was gone (and hasn't returned).

As for the shifting on its own...are you sure you've got the gear selector in S (not D)? In D the car will go from paddles back to auto on its own. In S (assuming I've paddled into 1st), I've never had the car upshift itself (and I've banged it on the rev limiter in both first and second many, many times). Of course hitting the rev limiter in the A6 will typically kill your autocross lap (at least in my car, hitting the limiter results in an engine retard that feels like you've just lifted off the gas...which can also unsettle the car a bit depending upon the situation).

As far as transmission temps....I've never had a problem running here in Southern California. At least not transmission temps. I have massive problems keeping the engine cool on warm days. If it's above 80 degrees, we've got the hood open in between every lap. I try to spray water in the front grill to hopefully reach the radiator, but it doesn't really seem to help.

I know it's not a popular opinion, but I've had good success with my A6. I'm a solid upper mid pack level driver, but throw a National Champion level driver in my car and it's pulled street tire top time of the day several times....and that's completely stock with the exception of a front sway bar.

That all being said, I daily drive my car as well and I paddle shift it from just about every stop (typically I shift from 1st, to 2nd, to 3rd...maybe 4th, then hold the + and let the auto take over while cruising). The paddles are not Porsche PDK quick by any means, but once you start using them until they are second nature, you're brain will figure out when to shift automatically so that the shift will happen when you actually want it to happen.

But in autocross....95% of the time, there's only the one shift from 1st to 2nd for the lap anyway! Get a decent launch and once you're on your way, hit the + button and forget about it!

Raffman55

You might have something there. Going to check adjustment on the shifter, it could be sliding back in drive !