I started my 91 M3 the other day and heard a strange noise that appeared to be coming from the transmission. When I tried to put the car in gear it was quite difficult. The noise went away when I let the clutch out in neutral but then came back when I pushed it in again. I did this a few time, putting the car in gear and letting the clutch out in neutral and it eventually went away. I didn't let the car move until the noise was gone. This has me worried. IF anyone has any ideas as to what it may be please let me know.