hey guys with the 1000 sportsman after you ride for quite awhile stop and get off and feel the drive axles going out to the wheels form the rear diff, mine is hot to the touch on the muffler side, I am just wondering if it is the Muffler causing it to be hot or do I have a bearing going out, the diff itself is not hot, just trying to find out if it is hot because of the muffler

thanks guys