1989 Case International 856XL 4WD tractor

16 speed gearbox with speed reducer Starts and runs well. C/w 2 SCVS, hydraulic trailer brakes, pickup hitch and air conditioning (not working). Unfortunately the cab is suffering from rust and the levelling boxes and lift rods for the pickup hitch are missing. Mechanically everything seems to be working ok apart from it is permanently in 4WD. Speed reducer lever is working but stiff. Hours are recording 6327 and counting. Serial no: DO30296F012429 Drive: 4WD