speedometer trouble

["painintheass7565" <advantics@xxxx>]

My odometer works but not the speedometer. When I first got the car, 
neither worked. I replaced the angle drive and cables, and found the 
lower cable was 1/2" short. If I hook a drill up to the lower cable 
(to simulate driving) both the speedometer and odometer work. When 
hooked up and driving, only the odometer works. They both operate off 
the same cable don't they? How could this be? Help.

John
1383 $ 5326