Eddie I am doing complete engine rebuild. I figured I will put new seals on input shaft on transmission and new throwout bearing. Its an old farm backhoe that sees light use. It only took me and dad four hours to get it broke down to this point. Parts have been available from a local tractor shop with everything I have needed so far being in stock. Its a Perkins 4.203 engine so all the rebuild stuff was a click away from eBay.