So both rear wheel bearing seals failing (2014 3500 longbed,HO/Aisin) at 75,000 miles. Will be covered under Max-care warranty. But maybe failing due to slight slop in the wheel bearings? I feel like at this mileage I should replace bearings too, not just seals, even if bearings "look OK". Already replaced a failed FRONT wheel bearing. Are factory bearings cheap Chinese crap? Thoughts?