Hi exfarmer, the one I have had some involvement with only had the external fiber gears, I guess a few bearings in there and the pulley from the belt has a couple of bearings, I had to replace those from memory. I can't imaging replacing those would go close to replacing the under-designed, fragile 3 speed Honda gear box. If you were closer I would grab it in a heartbeat. My grandson is using his great grandfathers in his mowing business and loves it.