WANTED!! Looking for #44 pump drive for D4

That shaft can be repaired fairly easily.
My method to do that, is to purchase a new coupling, Hub-City 0332-00348, best to confirm that part number, cut off the old coupling section, then turn down the shaft to a couple thousands larger than the ID of the new coupling, press on the new coupling until the correct length and weld in place. if you can't do it, it should be an easy job for a machinist.
 What condition is the input shaft?

That shaft can be repaired fairly easily.
My method to do that, is to purchase a new coupling, Hub-City 0332-00348, best to confirm that part number, cut off the old coupling section, then turn down the shaft to a couple thousands larger than the ID of the new coupling, press on the new coupling until the correct length and weld in place. if you can't do it, it should be an easy job for a machinist.
 What condition is the input shaft?

Josh, thanks for the part number, ill look into that coupling. I just had to do the same for a Be-Ge pump shaft that was worn out. Figured thats what i was going to have to do. As for the imput shaft... oh its not perfect but better than the coupling. Should outlast me. Thanks Again for the help. Robert

That coupling is the proper match for that spline, also the same as the winch and PTO input shaft spline on the D2. The coupling is long enough to press on to the cut down old shaft, which makes it very easy to get proper alignment, or it could be cut in half to make two couplings.