My 2001 660 raptor seems to be having some issues with the rear axle nut. Seems like about every 2 rides the rear axle nuts back off and loosen up.I average about 75 to 100 miles a ride and this is driving me insane. The rear bearings and seals have been replaced and the axle has been upgraded to an 2003 axle because i had a mishap with a tree,kind of jumped in my way...lol So i got pissed off and ordered a mod quad double locker after market axle nut to hopefully cure this issue. I would love to hear any input you guys and gals my have. Is anyone else ever run into this issue,and how did you fix it? ,Thanks a bunch