You didn't say how many miles,Jon,but it's gotta be a sticking brake caliper or piston inside it.If it were a wheel bearing,I'd think it would've locked up on you by now,so get that wheel off and replace that caliper. When you look at the brake pads,they'll probably look pretty bad.Or take it to Midas or Sears and get6 the brakes done and have them look at the wheel bearings.Depends on what you want to spend,really. Hope this helps! don-ohio (:^D