After hearing the plans of a execlent racer at the track tonight I have decided to make a new rear axle. I will have it the same length and width but insted of having a screw going into the axle I will die the outer edge and put a lock nut on it. That should work better.
I fubed up while cleaning my car before a race. I was cleaning and oiling the rear axel parts after discovering that my o-ring was pan-caking out making my diff. be really lose and I was thinking to much about how to fix than what I was doing and lost every bearing out of the thrust bearing but 2. :-/
At the end of it all I decided just to do a timperarey rigging of it and put 2 small washers to replace the o-ring and REALLY greased up the thrust disk so it would slide good. Then I put loctite on the diff. screw and locked it down.

only until I get my other one going.