the rear diff have just went to sleep for good, the car is a inferno MP7.5 RTR, shall i repair the diff or replace it. the most of the car is upgraded but the diffs have never been replaced so they are original from when the car was new. the engine is a OS VZB, i have around a RB C5 iam wondering to put in the car. what about the diff's then. TDC, torsen, any1 have any ideas.