Has anyone ever changed the rear axle outer bearings on their X? I see its common on 2nd gen xterra's but haven't found good info or how-to's on the 1st gen. not sure its my problem but possible bent axle or bad bearing. Feels like a flat spot on the wheel sometimes and i know my rear tire was contacted when i was rear ended once before. I also get an odd grind when coming to a complete stop after the truck sitting over night. the grind goes away after the first few stops. breaks are all in good shape. feel like the grind is coming from the rear end.