electric speedometer test question?
 

well, i finally got around to replacing the worn gear on the odometer, and i was wondering if there is a easy way to bench test the speedo and odometer function while you have it out.
i have a couple of friends that want me to fix their ods, but swapping mine in and out is getting old .
ive fixed 3 so far, and have tested them in my car, but man, it would be great if i could do it on the repair bench.