Amazon.com: Timken SP580205 Axle Bearing and Hub Assembly
The timken bearings have 2 differences on the early '_99 trucks. These bearings are meant to fit the later '_99 trucks. The later '_99 trucks have a different thread pattern. and the outer plate is about 3/32"_ thicker. To fix this problem. you have to swap out the lug nut studs on the bearing plate closest to the outside of the axle.