Reffio wrote:What determines if the flywheel needs done and what's the possible impact if you don't do it when replacing the clutch?
Take advice from who ever is doing the job on your car as long as you trust them with regards to the Flywheel condition, I think a worn Flywheel has a bit play in it or signs of excessive wear, there are people on hear that can let you know the specifics. I didn't replace mine when the rest of the clutch was done as the mechanic said it was totally fine, I hope I don't turn out to regret that decision.
Its the labour costs that kill you, so if the flywheel packs in 6 months down the line it's another gearbox out job, which at an Audi Stealer's will cost you around 8 hours labour which = Mega Bucks.
If the flywheel is seen to be in good condition then it's your call to get it replaced when the gearbox is out or not, I think a new Flywheel is around £700 / £800.