So the original owner replaced both rear bearings at 60k. At 120k the right rear went so I just replaced the bearing, not the hub. At 130k the r rear went again so I replaced the bearing and hub. Now at 144k the right rear is making a low growling/roar noise again. A mechanic friend said he isn't convinced its the bearing because he said they always have wheel play (this one has no wheel play). I don't know what else the noise could be. It does have the rear diff noise (has for 80k) but I can hear both noises at once so I think that's out. The left rear is quiet as can be with no wheel play. I put 20k on a year in rual MT (we have to drive 2 hours for groceries) so I need it to be reliable. Any ideas why I keep going through wheel bearings like this????