EDIT



b][/b][quote=gregsdart]Stock gears don't like a lot of shock loads, like sidestepping a stiff clutch at high rpm, or hi rpm transbrake launches. They will live for A while. A stock dana can handle a LOT of off idle or low rpm launches. So take it easy on the launchs, or buy a spool, 35 spline race axles, and pro gears.
I had a posi go away at the track many years ago. I pulled the posi out, put a shim in it made out of a coffee can lid, wholla! Locker! Just be carefull the halves of the locker touch when you bolt it together. I put two shims in, had to remove one and all was great. [/quote