Don't feel bad, I had the same experience with my 1510. I was bushhogging when the rear wheel fell into a big hole. in the process of trying to get out of the hole, I jammed the PTO shaft into the PTO housing. I had the same results as you. I found a used gear cluster from an importer in Georga. I can't remembre there name, but I can look it up tonight. E-mail me if you would like there name. The cluster came off a junk tractor. It only cost $175 Shipping included. Best of all, It was on my door step in 2 days. As for resealing the tranny case, Go to your Local autoparts store and ask for Blue RTV. It works great.