Quoting Removed, click Modern View to seeHere are the technical data sheets for the two Smitty tractor transmission Fluids. Do not confuse the two as they have vastly different characteristics.
SuperTrac 303 Tractor Transmission FluidSuper S Premium Tractor Transmssion FluidThe following is straight from the 303 datasheet. The portion I highlighted in red is pretty clear - it is a low end product and in no way shape or form is it equivalent to Ford M2C-134D.
Quoting Removed, click Modern View to seeIf you look at the datasheet for the premium fluid you will see it is a typical UTF and a generic equivalent to Ford M2C-134D, Kubota UDT John Deere J20C, IH HyTran, and a host of others. Spend the extra $5-$10 for a premium UTF - it is well worth it even in an older tractor.
TOH