wjhpilot

Had the Transmission malfunction: limited driving functionality message pop up for several months now with no degradation of performance until two weeks ago when suddenly I couldn't accelerate very well. I have APR Stage II, exhaust, intake, AK, and Eurocode Sways, with only 29,000 miles on my 2010 S-4. Followed NWS4guy's advice (thanks Neal!) and went back to New German Performance (they installed all APR aftermarket items) to re-flash to OEM stock. Took car into dealership who I've always had a great relationship with (and have always told to not plug in when being serviced and never was asked why), told them about the tranny malfunction codes and had my Audi service accomplished at the same time. Obviously I was worried about what I assumed was to be an imminent TD1 with accompanying hassle and lots of grief and money out of pocket. Wasn't looking forward to that at all. NO TD1! All covered under warranty. They didn't detect the tune. The service synopsis said the following: Customer has U12 PT VERF CUST EXTENDED WARRANTY FOUND FAULT DTC P17D8 with symptom code 8040 MECHATRONICS CIRCUIT BOARD FAULTY As per TSB #2030477/6 REMOVED SUBFRAME CROSS BRACE. DRAINED TRANSMISSION OIL. REMOVED ATF PIPING. REMOVED TCM CONNECTOR REMOVED TRANS OIL PAN. REMOVED MECHATRONICS UNIT. REMOVED BOTH CIRCUIT BOARDS AND INSTALLED NEW ONES. REINSTALLED IN REVERSE ORDER FILLED TRANSMISSION CLEARED DTS AND TEST DROVE VEHICLE. They also performed a 24AS update - ECM Software Update (FED - EMS). Not sure what that was. Anybody know? All in one day. On the road by 5:00 PM. Drove it a week to ensure codes didn't return. Tomorrow I'm going back to NGP to return my car to hot-rod status. Couldn't believe how slow it was after the re-flash to OEM stock. Went from Hot Rod to No Rod. I can't believe the difference. The big thing I wanted to get across is how the re-flash to OEM stock worked with no resulting TD1. Also wanted to hear from one of you geniuses what they feel about how my mechatronics was repaired. I assumed they were going to replace the entire unit, not just replace circuit boards. It certainly seems to have worked but I'm not as much of an Audi geek as many here on this board!

m444

Info in these links;

2010-2012 S-Tronic TSB (Photos)

Transmission failure?

wjhpilot

Appreciate the info. Been driving it pretty "sporty" since the re-flash and still no trans malfunction codes. Seems to be fixed. I'm still thrilled the flash back to OEM stock really worked. Surprised nobody has commented on that as the TD1 has been such a big issue in the past. Guess it's old news.