My driver's side window motor is driving me nuts. I've replaced it 5 times and replaced the gear set once. It works for a dozen times or so and then the gears strip out in the motor. Is there any year model that uses metal gears instead of plastic? I have to roll my window down every day to show my ID card when coming on base and it's getting downright embarrassing that even the gate guards know I can't fix my window! It's a '91 Shadow. BTW, the original motor lasted 15 years before it went out.