Speedometer problems

JUST IN CASE.

Every once in a great while I run across a speedo that jumps around like that and pulling the cable back from the speedo head a little while it's still connected fixed it.
The cable was pushing the little (thing) whatever it's called that it turns in the speedometer against something else in the speedometer and making the needle erratic and way higher than the actual speed.

Just reach up under there and pull it towards the fire wall a little.

Might make it work right again.