speedometer

A speedometer has some tiny little bronze bushings and a tiny shaft spinning in them. And one part spins inside/outside the other. So enough bushing wear allows one part to touch the other. Rather than only the spinning magnetic force moving the needle a very light, very brief physical drive force is. Back when I serviced these things I had pics of egg shaped needle shaft bushings, scarred drums, broken shafts, and more. Anyway...
Having a speedometer restored is costly. Wait until that light touch becomes not so light and carries the needle a lot further, a lot more damage will be occur. New needle, new needle return spring, etc.., = Significantly higher cost to restore. Good luck