Frayed speedometer cables damage the inside of the sheath to create two sources of binding. This is why entire cable assembly replacement is so important to smooth speedometer operation.

A traditional Pontiac has a mechanical, cable-driven speedometer, while the new gearboxes employ a vehicle-speed sensor instead. The electronic sensor sends a signal to the dashboard of a newer ...

Three-speed manual and automatic transmissions have the speedometer cable entering the driver's side of the transmission case.