On my 1988 Audi 80 (2 liter) many poeple have suggested that the thump on engaging the clutch is probably the mounts. Well I have looked at the engine and tranny mounts and they look ok - no visual signs of deterioration. How do I make sure that they are ok or bad before replacing them. The tranny mount for that car is quite expensive and a bear to replace. Best Regards, Vikram.