Well, I finally found one. Return to the mothership if all else fails... I finally navigated to MTD's site (go figure) and can still read my mower's model number. They have a web app that shows an exploded diagram and all part numbers. Yes, the gears are expensive (on MTD, m-and-d.com, and outdoor distributors' web site -cheapest). But, I 'printed' a PDF of the diagram and one of the part numbers. Happy to send to anyone that needs them, but you can get them from their site afterall. dave kelly 1979 at yahoo com (no spaces). Thanks!
Dave
August 2008