Newracer- Slayer has the order of parts correct. I also suggest the following: 1) sand the d rings with either 400 or 600 paper and clean. I do this with a little oil on wet/dry paper. Make sure that the ring is flat in the area the balls will ride. 2) always use new diff balls when rebuilding. 3) the outside bearing needs replaced regularly because crashing tends to wear them prematurely. I run at least 3 bellville washers to make it easier to control the force on the balls between the d rings. If you are running modified, I would consider IRS' newest differential for 1/12 that uses the outside ring on ball positions on the gear. That way you have more balls in place to handle the torque of the motor without slipping. Each time the diff slips, the suface of the balls gets flat spotted and gives you a gritty feeling. This is not good for a ball diff. Good luck!