About a week ago I started having bad wheel bearing like symptoms, the slight vibration and noise coming from the passenger side rear wheel. But being up at school in Grand Rapids and had to take it to a Sears automotive. The mechanic inspected it and all 4 wheels seemed perfect with no play. So I started thinking rear diff, drive shift, or cv joint. Any suggestions please?

 

Unless the bearing is completely ruined and sounds like it's full of rocks and sand the wheel probably won't have any play. If it sounds like a bad bearing, 99% of the time it's a bad bearing.

 

Ended up taking the car to an Audi dealership and told them to replace the passenger side rear wheel bearing for $320; which was actually almost the exact same as the Sears estimate.