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Hey guys and gals, I recently bought a 1994 yamaha big bear 350 with... surprise surprise.. rear diff problems. I have taken the rear diff all apart and the problem is the pinion bearings are both screwed. (Hope Im using the correct terms) Anyways there is a collar that has 4 "divets" in it that ya can beat on with a punch and it should turn. Well Ive beat on that collar and it is not turning. I have lubed, soaked, heated, cooled, you name it, and that collar will NOT budge. So as a last ditch effort before I take a die grinder and grind that collar outta there, I thought I would throw a post in here, and maybe someone has some trick or advice they can add that maybe I havent thought of. Now the axle, taking it out needed a beating, and I ended up screwing up the threads that hold the hub on, and eventually broke them right off. My plan is to drill about an inch hole in the end of the axle, thread it, thread a grade 8 bolt in there, loctite it in, then throw a bead of weld around the bolt. Im thinking for the little light duty puttering around I do with this quad, that this idea should be enough to repair the axle so the hub stays on, rather then fork out big bucks for a used or new one. Thoughts on both repairs would be great!