Wear on either the bearings or race.
roller bearings are only needed if engine has roller bearings, u would replace bearings with same bearings that are in engine and cam specs
it,s the bearings or a bad gear.
the bearings
Bad bearings inside or loose castle nut.
Bearings going bad.
worn crankshaft bearings
When my 2003 suburban did it. It turned out to be bearings. After replacing the bearings, no problems since. The bearing assembly has abs sensor attached.
Have u checked the bearings?
bad wheel bearings
You probably need your bearings repacked
The Best Brand for a roller skating boot is Riedells which range from $200- way more. Two bearings go into each wheel. With only one bearing your wheel would be really loose. I know because I figure skate on roller skates at the florham park roller rink.
Of course there are bearings, how else would the wheel turn. Fortunately you can buy the entire hub assembly which is only held on by 4 bolts, so no bearing removal or replacement into the core. This is about 45-$60.