About 75% of the time the bearings don't fail it's the wedge that falls out of the nylock spindle nut and then the nut comes loose and then the bearings fail which ruins the hub and or spindle.
To keep that from happening again either put the older style double nut with lock washer or put a new wedge on the nylock nut. I have part no's for either styles.
92 D250 custom made bed, 190 inj., 16cm , electric cooling fan, 2nd gen air horn, 5spd., Dana 61 3.31 gears, 1 stage W/M set up
97 2500 4X4 auto DDP 40 HP injectors, no 8 fuel plate, homemade 3" intake horn, BD converter, BHAF, electric cooling fan