Your rear stub axles will be oval by now. Jack the rear wheels up, handbrake off. Hold the wheels at 3 and 9 o'clock, with new bearings there should be some play (if not the bearings will squeegee the grease away and you have metal on metal and premature failure), swap to 12 and 6 o'clock, if there's more play this is an indication of oval stub axles. Most testers are too young to have experienced taper bearings and compare them to cassette bearings on modern cars and fail / advise is the norm.