Fixing a Speedometer??

Map63Vette said

I know on my 67 Dart when I first bought it the speedo was dead. Turns out the speedo gear in the trans was just all chewed up and not even engaging anymore. Would be worth a shot to check the cable at the trans like mentioned before pulling the dash out I would think.

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In a situation like this I would check to be sure the gear adapter was indexed correctly. The gear adaptor has to be rotated to the correct position to engage the teeth of the driven gear properly with the drive gear. It depends on the number of teeth on the driven gear. The adapters are usually marked to make proper instalation easier.