I was at the local track when went to launch the car, it inched and nothing happend car did not move I had to be pushed back to the pits. Now I can shift into all gears just fine but does not get power to tires or axles they dont even try to spin. When Im in gear we could push the car back and forth in every gear. We think it is the differential. There is some griding when In gear with clutch not ingaged, but no noise at all at ideal. Could there be another problem? I have a 97 ITR with the LSD so if this needs to be replaced what do I go with, Quaife Kaaz are out of my leage becuase of price. I see some LSD OBX on ebay are they worth anything, Is there a cheaper upgrade LSD better than the ITR LSD.