Ouch, I checked the tractor today and there is now a huge puddle under it. Sure does look like UDT - checked the level on the dipstick and it does not even show on the stick. I looked under the seat and there is the tool box there and behind the seat is the filler cap for the transmission, but I don't see any kind of vent.
This is baffling me....the only thing I know to do is clean the floor and fill up the transmission, then run the tractor to try and figure out where it is coming from.
By the way the hose is in fact about 3/4" and hangs down directly below the dash, near the filler cap for fuel. However I have not put fuel in the tractor in weeks, and now that the UDT is clearly low and what is on the floor seems to have more viscosity than diesel, I have to conclude that it is in fact leaking UDT.