i bought a 2007 grizzly 350 with IRS. and its drives/runes great when i go forward and reverse. over a certain speed. there is a popping noise. i changed the wheel barranings in it. still makes this noise can someone maybe give me or tell me whats wrong with it. it does this in 2x4 and 4x4. someone said to change the axel the cv joints or possilbe a band in the rear end needs to be replaced has anyone had this problem before?