i had something similar happen. i have a moose basket so the main gear bolts to it. any way the small gear in the back broke into pieces and sheared the four bolts on the basket off, and all the little plastic cushions when into the tranny. had to replace all the seals, new bolts for the clutch, buy a new main gear, and a new idler gear. and while it is apart it is being ported and all that fun shit. oh and cant forget thee new stator w/ adjustable timing plate. lots of $$$$$$$$ (up to about $450 now ) when i heard that grinding sound behind clutch cover. so if you dont want shit like that to happen spend the money now and fix it right.