Originally Posted by
Marc sierra
As far as I know the XR4x4 shafts are about 2 cm longer than the Cosworth shafts. I wouldn't think the XR4x4 shafts would ever be needed, independable on the ride height. Even on standard springs the standard shafts should be OK when the car is on the bump stops. In my opinion the weak rubber engine mounts are the cause of any front drive shaft problem. So I'd fit some stronger engine mounts (like Collins or Vibratechs) and standard drive shafts.
Good point, change the drivers, offside engine mount to vibratechnics, the nearside can stay standard. This was the advice of Mark Shead as it helps reduce vibration and the near side is not the one that fails normally.
I have read many posts though on here where lowered cars can pop the driveshaft and the advice is to use the longer xr4x4 ones...also worth checking that xr 4x4 hubs have not found their way on to the car as these are also different.