Ford’s body builders ppt presentation (page 54) indicates AWD is “custom-designed for Transit”:
https://www.fordbbas.com/publications >What’s New >2020 model year Ford truck What’s New manual
(apologies if old news)
Astro/Safari model year differences
Detailed specs for the last few model years can be found on GM's site:
http://archives.media.gm.com/division/2005_prodinfo/chevrolet/trucks/astro/index.html
http://archives.media.gm.com/division/2004_prodinfo/chevrolet/trucks/astro/index.html...