My Isuzu shop used:
14 qrts (Mobil 1 ATF) for the tranny flush and fill
3 qrts (Mobil 1 ATF) for the transfer/TOD cases
4 qrts (Mobil 1 Gear Lube Oil 75w 90 )for the diffs/ also added a lsd additive to the rear diffs.
5 qrts (Mobil 1 10w 30) engine oil