Van Door Motor Worm Gear

[Anthony]

I apologize if this is somewhere else, but I have not found it here on CD or outside on other websites. So we are still working on our arm and after opening the van door motor have decided we want to alter the worm gear. Does anybody know the specs of the current worm gear in this motor? Particularly we are looking for the pressure angle and the pitch, however, any other information would be greatly appreciated.