Thanks for that, I did look for gearboxes when I started and turned up zip. Maybe I just didn't look hard enough but that is why we join these forums, to share the knowledge! It is indeed a 5 speed Peerless Tecumseh, but it only has one PTO and a disc brake on the other side. I'll keep looking through the examples you found for me. Should I keep posting photo's here or in a gallery or something?