I am missing the small pin that goes between the transmission tailshaft ( 4 sp ) and the speedo cable adapter. Are they available, and if so from where? Thanks

A little more description.

If you're talking about the square drive piece between the speedo gear and the speedo adapter (gearbox), then, the dealer would be the only place to get one.

If you're talking about the large driving gear on the tailshaft, I had thought they were pressed on the shaft. I could be mistaken. Again the dealer or any trans shop from their spare parts bin.

"Key", GM #867209 - don't know if they're still available or not. graemlins/thumbsup.gif