For anyone with a Ford van who wants to do their own maintenance, there is a good resource on Youtube I've used a number of times. FordTechMakuloco has a bunch of videos with a lot of insider knowledge. He used to be a tech at a Ford dealership and now has his own shop. He gives a list of parts and tools needed for each job. I referenced his transmission fluid and filter change video when I did mine shortly after I got the van. The video is below.
I have a rear differential fluid change on my list of things to do and he has a video for that as well with information on the correct fluid to use according to the latest Ford service updates.