I took the fan out and cleaned it all up. Oiled it. Made sure it wasn't hitting any debris or anything. The only thing I could find that was loose was the belt. It had a teeny bit of wiggle room on the sides, but could find no way to tighten it. I didn't see any brand name on the motor, but maybe I need to detatch it completely from the cover to see it. I'll have to check that and post back if I find one.