Looks like My S3 is in need of some surgery to the transmission, most probably the gearbox. I was just driving normally, and pulling out a slip road onto the motorway, I changed from 5th to 6th at around 60mph and felt a jolt though the car. I thought nothing of it and felt a second jolt followed by some metal to metal grinding noise, so dipped the clutch immediately and coasted to a stop on the hard shoulder. During the coasting period, all the qestions and answers from this forum was going through my mind of what could be wrong lol, I thought I had hit something and lost all my engine oil, and the grinding noise was my cylinders eating into the block!. As I came to a stop, the engine had stalled itself, so I was fearing the worse, so I got out and checked the dipstick, and the oil level seemed fine, so my engine seemed intact. Got back into the car and she started up just fine, but when I went into 1st gear, I couldn't pull off?!? the clutch was biting, but the car seemed like it had the handbrake on, but it definitely was off, put into reverse and it went backwards, back into 1st and no movement. At this point, a highway patrol car pulled up to lend assistance, as I was in an 'active' lane, so I had to use one of those SOS emergency phones to call the AA up. 45 mins later, an AA van turned up, and having a look underneath, he said it's leaking transmission fluid around the gearbox area, something is definitely broke, so next cause of action was to tow the car away. Our attempt of toeing lasted around 50 yards though, as there was some major grinding noise, so attempt aborted, and I had to wait for a flat bed recovery truck. 1 hour later, Car is put onto flatbed, and toed back to my home, gonna see how bad it is in the morning. I'm not 100% sure what could be wrong with it, but I have read that the pins in the front diffs can break and put a hole through the gearbox, which looks most likely has happened to mine, any other opinions?