Not sure if you need the information...but, My passenger side did the same thing, I removed the 2 motors attached to the gear box on the lower left rear of the right seat. Then removed the 6 screws attaching the cover and low and behold a plastic gear on the worm gear is broken. Looking for the part now... Stealer says they sell only the whole part. Didn't even ask how much. Anyone with a parts guy out there?