I just bought a used 48 exmark walk behind. Its pretty old and needs some work but it was a good price. It starts and runs ok blades engage and cut . The only problem is the gearbox is shot. Its not a peerless trans its the one used on several different brands with a belt driven worm gear and a horizontal gear attached to the drive shaft. I pulled the cover of to have a looksee and saw the horizontol gear was completly mangled. Now i have 2 questions. What could have happened to cause this? ( so i don't do it ) and why cant i find just the gear? i have tried like 10 different online stores including jacobson and few local shops unfortunatly unless your good buddies with my local exmark dealers (Not Conway)and sit around and shoot the breeze and drink coffee all day instead of work they treat you like crap. so they were useless. can anybody offer any advice or recomendations? Thanks.