The screeching and bouncing of the speedometer dial might be a bad cable. The turning part is really a tightly wound spring. It sticks a bit and then catches up. It happened to me on another truck. Can you take out the odometer to see if the drive gear or something else is stripped?


1948 3/4-Ton 5-Window Flatbed Chevrolet

34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.