ive rebuilt the diff several times, the cone washers are fine, and the plastic nut the diff bolt screws into isnt stripped and it cant strip (another excellent design by xray), im just going to get a brand new complete diff and put carbide diff balls in it.

at castle hill on friday it was slipping bad due to the torque of the hacker 6turn brushless, i put the locked diff in and all it wanted to do was donuts, it was bloody hard to drive.