In Canada Kubota and their dealers do not sell UDT nor S-UDT2 at all even though I would bet the tractors they sell in ND are same.
The Dealers sell Kubota branded Premium UDT in Kubota Orange Pails and Barrels (made by Petro Can) and on the pails it reads:
- "....specialized, synthetic-blend hydraulic/transmission fluid formulated for extreme cold weather and high-load performance".
and
- "..... Specially formulated for transmissions with wet brakes as well as power steering."
Petro Can. says its the same as their DuraTran. In the US I have read Valvoline makes a lot of the Orange Pailed hydro fluids.
The Kubota also prints on the back of their Premium Transmission oil pail:
Kubota recommends:
Premium udt
Sudt2
JD JDM J20D
Case MS 1207 / 1209 / 1210
FNHA 2C 200.00
CNH MAT 3505
So our manuals say one thing, what they stamp on their pails/barrels say another but matches what the dealers / corporate supply is another.
edit: I use the Premium UDT I get from my dealer. Price seems competitive.
The principal difference in UDT and SUDT2 is viscosity
UDT =: John Deere Hygard (J20C) = Duratran
(VI = 140, KV100 = 9.5 cSt)
SUDT2 = John Deere Hygard Low-vis (J20D) = Duratran XL
(VI =200, KV100 = 8.2 cSt)
There are a gadzillion J20C formuIations on the market. J20D products are less common but increasing.
Kubota USA says SUDT2 is "preferred" and UDT is "also acceptable" which should tell you something.
Dan