John Deere Hygard hydro/transmission fluid?

Anyone ever here of using this in their transmission? Found a YouTube vid of a guy that used this in his A518. I believe he said he used 2 gallons of this with 2 quarts of dot3 fluid if I remember correctly.
I know JD lubes are supposed to be superior as they’re used in HD tractor applications but I only use Hygard in my JD 318.
Going to see if I can find the vid again and post here.
Thanks