Update: 'Tapping' did no good, opened it up, and lo & behold the motor was full of rust & stuff! With the help of Mr. Safety, solvent, & scotch Brite pads, got it cleaned up and put back together & it runs! Next problem is getting the whole unit put back together (planetary gears = lots of teeth to line up!). Ran out of time & patience before our Hot Springs run so I threw it in the floor & I'll deal with it next week. Sure hope I don't need a winch at Superlift!