I have a 2001 Forester and the drivers side rear wheel bearing is humming. I had my mechanic shop attempt to change it but the axle is frozen onto the spindle/hub. He did not want to heat it due to possible damage. I can get axle and spindle for $100 from junk yard. He will change bearing on junkyard part and re install. How long can I leave it humming before I HAVE to change it? He may or not be able to salvage axle. Which website has absoulte cheapest oem parts for subaru?? Thanks