Late last night I noticed a bad knocking / grinding noise when rolling backwards down the driveway with the clutch in...sounds bad. Seems to be coming from the around the back of the car, so i'm guessing the diff is stuffed?
Rolling forward with the clutch in sounds OK, as does driving backwards in reverse with the clutch out. Any ideas what might be broken?
Car is a R32 GTS-T, motor is all standard except for exhaust.