From '65-'93, Mustang speedometers were cable-driven mechanical instruments that worked on the eddy current principal-a magnet whirling around inside a shell attached to an indicator needle. The ...

Your car once had a rock-steady speedometer needle, but now it’s wandering a bit — or a lot. Maybe it’s not indicating any speed or it’s showing 60 mph and you know that can’t be right. “An easy way ...