My 2006 A3 2.0T DSG Sportback has started making an odd noise on the overrun. Once warm (~10 mins), when accelerated, even modestly, then let off to overrun, about 2 seconds from the accelerator being released there's a short squeal, similar to when a fanbelt starts to go. My garage said it was coming from the gearbox area and might be the flywheel, took it apart then said that although the flywheel was worn there was play on the main shaft to the gearbox and they couldn't fix DSG boxes. A gearbox specialist agreed it was gearbox, clutch or flywheel but weren't sure which, even getting a VAG specialist to listen to it. None of them could pinpoint what would be causing the noise. It's only done just over 70,000 miles, 50,000 by me since I bought it 6 years ago. Gearbox oil replaced a couple of years ago. Anyone on here had a similar noise and know what the fault might be?