I replaced the turn table motor.
I ordered a new cooking tray coupler at the same time in case it fit tighter than the old one.
In addition to the two screw bits needed to replace the motor, I used dish soap in a cup to clean the grease off the hood screws and a bunch of Lysol wipes to clean the underside of the hood and the wire connectors before attaching to new motor. I highly recommend watching one of the online videos. It came in handy.