eyra94; Sounds like you may be tightening the castle nut too much or using the wrong grease. You may have ruined the bearings and the races, but the axle and the hub should be ok. After replacing the bearings and races, pack the bearings with Amsoil Water Resistant Synthetis Grease, And do not crank down on the castle nut. Its better to be a hair loose than a hair tight……………Mike