Well, apparently the speedo drive is the least of my problems - shop says the entire tranny except the case and cluster is toast. I saw the damage so know they aren't BS'ing me. Now looking at a rebuilt exchange for $900+ shpg, w/ warranty. So much for swap meet trannys that look okay, and I'm not exactly new at this either. Guess I should have been more critical. Bummer. Embarassing and expensive bummer.