Originally Posted by mr lee

Apparently this is a known problem with the 05 ball diff and some have now reverted back to the 03 diff.

In our TC finals my car just slowed right down and then towards the end of the race seemed to speed up. I had this happen before when the tyre jumped off the rim and was wearing on the steering hub. This time it was the diff.........it tightens up when turned in one direction and loosens in the opossite!