Thanks Canadian. This issue only seems to show up about 10% of the time when I'm driving. It seems to only show up after I have been driving the car on long distance trips. Never on short runs in the city. Does it still sounds like a wheel bearing issue? Another person that I know suggested a cv. I'm not technical enough to be able to diagnose it on my own And was hoping to avoid some of the costs associated with diagnosing it at Subaru.