My early model FT60, which changed to the 555 in the mid '00s , owners manual says to use M2C86-B or M2C159-B in the rear axle and transmission.
Those hyd oil numbers is a Ford number. My FT60 with the 5320 loader has over 2200 hours using those M2C numbers and no issues so far.
Brands??
I use brands from TSC stores or brands that my former Farmtrac dealer carries or a local farm and ranch stores brands.