67 Barracuda rallye speedometer issue

Mine bounced and clicked. The Speedo needle would rise, then fall back to zero with each click. I tore mine apart recently and found that the initial, rotating part that spins with the square end of the Speedo cable was fine, as well as the nylon gear that runs perpendicular. But beyond that, everything seems seized. The clicking was the nylon gear teeth slipping over the seized gear teeth of the brass gear that leads to the rest of the odometer gears etc. Hence, the nylon teeth seem warn down. No solution yet... just found this out tonight, and I have to see how much of the Speedo head can be taken further apart.

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