Speedometer trouble
Where folks mess up the speedo cable R&R. They think they can just poke a new cable in the instruments square port. Wrong. That port has now harded metal wear contaminated grease/crud in it. Pulling the instrument panel to properly clean this port isn't anyways easy or fun but we gotta do what we gotta do. If the cable end is pushing on the instrument, that's where the fault is. The cable end is about 1/8 short of the port depth, but the crud filled that. And be sure that the cable is routed a straight toward/into the instrument as possible. You don't want it pushing on the instrument in any direction.