John Deere Hygard hydro/transmission fluid?

I am all for experimentation and finding new/better methods of about everything but I would question this in a transmission unless someone with an engineering degree and a background in automatic transmissions told me otherwise. Not saying it doesnt work, but I don't think I would risk my trans to see if it works or not.
That's just it isn't it? lol.
Wondering if this kind of experiment has been tried and or confirmed without damage and just what the benefits might be. Any trade offs if it could be used without damaging anything.