Hey guys, my dad has a BF wagon had some bad noise coming from rear after a little while the rear left bearing collapsed so we replaced both rear bearings maybe 3 weeks later the new one did the same now we changed it again and it is starting to make the same noise not even a week later

Any ideas they were fitted by a qualified mechanic of ours who looked over the diff and housing and believes all looks good

Any help would be appreiciated

Did the mechanic check to see if the axle was not straight? maybe the hub has a run-out?