After 14 years of faithful use the power ramp in my mini van needs repair. I can hear the gears in the motor assembly skipping and was wondering if anyone has any experience replacing one of these motors? What can I expect, is it any more difficult than replacing the actuator on a power hospital bed? Just need a general idea, I understand that all conversions are not the same. My vans is a ROLLX 2003 Chrysler conversion. The replacement motor is $450.