@Mike0289 posted:Thanks for the feedback, gents! The problem does seem to follow the motor, at least to some extent. Swapping rear trucks with the trailing A-unit may have helped some, but binding is still occurring. I'm hesitant to do anything destructive like taking a Dremel to the worm gear, but I think shimming the motor up a little bit should accomplish the same thing so I'll try that.
Mike, take out a good motor and compare how far the motor worm extends beyond the mount to the one that touches the truck. Shimming the motor would work too.
Pete
