I just got this transaxle, it's from a big old sears craftsman tractor mower, 3 forward 1 reverse. I couldn't find the tractor model or serial #s on what was left of it, it did have a blownup 2 cyl opposed 18hp B&S engine on it. The only #s I could find on the transaxle was on a tag ser#67007 and type# 105401X does anyone know anything about this trans as far as how much hp and rpms can it handle.