Walmart utf oil meets the m2c134 spec and is fine in your hyd's, diffy, and tranny.
the 80w90 gl5 oil is also ok in your diffy and tranny.. and in fact.. I prefer it.
utf or aw32 ONLY inthe hyds'.. though i prefer utf here in case of leaks.
yes.. the gl1/3 or yellow metal safe gl4/5 issue was for the 9-2-8n, and fergy's with belly pumps full of brass.
if ya bought the walmart supertech transdraulic oil you should be fine. I use it in my ford 5000 and NH 7610s as well as my old ford 00 and 01 series tractors.
soundguy