Roger, nice work . Wish it was easier to get to the motor. Still have not figured out why my roof doesn't open. Wish there was some way to determine if the final pinion gear is turning without tearing everything apart. Were you able to remove the motor on the van? What is the pinion gear turning when the motor runs? Could this coupling strip out if there is too much drag on the roof? Also, when you moved the AC equipment out of the way did you have to open any lines that would cause a lost of refrigerant?