ahh ok... yea that doesnt sound like any fun. I changed the rear end in the buggy from 7.25 to an 8.75, but then after a season I tore it down, and sent the rear end out to be rebuilt... all new seals, new gears (went from .323's to .355's) and had new bearings and all that pressed onto the axles, and then the guy who rebuilt all that for me re-installed the rear...