Re: Checking/Adding Transmission/Hydraulic Oil?
If you have a hydraulic pump inside the clutch housing, a torque amplifier, or a rear lift mechanism(like 3 point hitch) then you use HyTran or similar product. If all 3 of these things are not on the tractor then you can use gear oil.
The oil filler is the big square-indented pipe plug by the shifter.
The oil level check is on the rear end housing. I believe it is a 1/2" square-headed pipe plug on the left hand side near the running board. That machine takes about 12 gallons of oil, fill it up until the oil is just below the pipe plug opening.
Additives don't usually stop major leaks like on rear axles and brake shafts. Only way to fix it is to replace the seal and possible the worn out bearing behind the seal.