Hugh - how much ATF for the transfer case did you buy? 2002 Gen1 transfer case shows capacity of 2.8 pints, not quite a quart and a half. AMSOIL Multi-Vehicle ATF retails for $11.50 a quart, $8.90 a quart through Preferred Customer program.
Ford says 80W-90 for All Temps in front differential, but 75W-90 is perfectly acceptable. Ford wants 75W-140 synthetic in the rear differential. You can see our offerings for your truck by using our Online Lookup guide that you'll find on my website.