Dealer service dept says above needs to be replaced at little over 30K on '95 NA? Thought it was wheel bearing(s). Anyone have this problem with low mileage? Car is not driven hard. Accident involving undercarriage required bearings & seals on right side,plus axle shaft replacement--not OEM. Body shop mgr says impact/shock from accident would not affect rearend/differential self-contained unit? Cross members needed to be replaced. I think this was due to accident not part failure. Expert advice needed and appreciated! Thanks in advance for any help!