It will be a while for me as I am at just 30 some thousand. I just did this on my 2013 5.0 and much of it is almost similar to the 2018 diesel. Here is what I did. I have one of these oil extractors:
I use it for a lot of things except extracting engine oil, easier to just open the drain on those. This thing makes sucking out old brake fluid from each wheel very easy, suck oil out of the front diff in just minutes. The front differential is hard to service otherwise as the cover is difficult to remove. Rear differential, use it to lower the fluid level before popping off the back cover. Transfer case is easy to do either way. The extractor costs maybe $75.
I haven't done serpentine belts yet but they look simple.
I use it for a lot of things except extracting engine oil, easier to just open the drain on those. This thing makes sucking out old brake fluid from each wheel very easy, suck oil out of the front diff in just minutes. The front differential is hard to service otherwise as the cover is difficult to remove. Rear differential, use it to lower the fluid level before popping off the back cover. Transfer case is easy to do either way. The extractor costs maybe $75.
I haven't done serpentine belts yet but they look simple.