The problem I seem to be having is that the diff seems to slip mid race. I had the circlip issue first time out but that was probably down to me not fitting it correctly but since i replaced the clip it just slips.
I tighten the diff then after a couple of minutes of racing the diff is slipping, to the point on saturday night that the car wouldn't move, when I felt the diff after the race is felt really tight like it does when the circlip pops out, but when I stripped it down the circlip was still in place. The only other thing i can think of is
the nut that holds the diff together threadlocked, if so it maybe worn
