Brought Home The Dream: '69 RS Z/28

[cruiserofland]

Pulled the speedo cable today to try to figure out why the speedo and odometer don’t move. Turns out they move just fine with a drill spinning counter-clockwise on the trans end of the cable. The teeth on the driven gear in the bullet insert seem to be intact, so I am wondering if there is a problem with the drive gear inside the tail housing? Looks like the factory-style plastic gear, and maybe a purple color? The yellow driven gear just barely fits through the bore in the transmission so it seems that it can’t be a bigger diameter, so I don’t understand why the teeth aren’t engaging unless there’s a problem with that internal purple drive gear. Hmmmm....