Well I drilled the rivets out and checked the motor and gear which was fine. I took the regulator out and realized that 2 of the teeth had worn away. I cleaned all of the grease off of it, used a welder to build up some metal where the teeth had been and then using a triangular file made two new teeth. I reinstalled everthing using 3 - 1/2 inch bolts to hold the unit in place instead of the rivets, replaced the door panel and I am back to normal. By the way, while I had the door panel off I would tighted all of the screws and nuts holding the wood trim...all were loose.

Antonino