In case you haven't gotten that far yet, There is a plastic trim over the aluminum trim that secures the slide drive mechanism to the side of the RV. There is a screw at the top that goes through the trim into a hole in the motor. That screw can be left in place while you remove all the screws on each side of the aluminum trim so you can remove it and access the motor. Since the hold down screw leaves with the trim, you can now lift up the motor and disengage it from the coupling. Now you can remove both tracks simultaneously since the driveshaft with the top and bottom gear can now freely rotate.