Originally Posted by
janga
Well recently i drove my car on a ice rink and it was amazingly fun trying to not skid

I was having so much fun that the throttle was on full about 95% of the time skidding maddly. I then went to race and somewhere, something went wrong. I could get perfect revs with no load but as soon as i put it down for the start of the qualifier, it would no go. It would move about ten centimetres and it lost power. Most people said it was a diff/gearbox issue. It was. And in the rear. I have opened up both diffs/gearbox's and the front gears looked brand new when i took the diff oil out of them. But the rear ones didn't. They were chipped, worn on one side of each tooth and looking fairly dead. I could feel that i could move the smallest gears side to side but a 0.2 mm shim behind it solved that. I then put it back together thinking the problem was solved to get on with my race. Only problem was that my problem was not fixed. Do i need to buy new internal gears or is it something else entirely?
Yes , purchase a gear set for the rear and when you assemble the gears removed the smaller .2 shim used on the out drive shaft before inserting into the diff case.
Then use 2 of the larger .2 shims under the sun gear instead and assemble the rest of the gear's as instructed .....