When changing fluid, I read 'start at rear drain plug and move forward'. Being a common sump design, isn't all ~5 gallons gonna come out rear end anyway? Don't have anything to catch all ~5 gals at once and wanna avoid all over shop floor switching out drain pans, etc.
Also, I bought 5 gals VP J20A ultra plus utility tractor fluid $20 at TSC. Looks like it meets Ford M2C-134C requirements. See alot of people have opinions, Tractor gets light use and I live in hot climate, no cold weather.