Dave, that master overhaul kit from Amazon doesn't include axle bearings, it has the bearings, seals, etc. for the differential.
Take a good look at your axle when you pull it, in these rears the axle bearing rides directly on the axle with no inner race. When the bearing gets rough, it can damage the axle. Pull both axles and look where the bearing rides, it should be smooth and not rough or worn. Sometimes there is a groove worn into the axle. If it's rough or worn, you'll have to replace the axle(s) also.