swapping all fluids, double check my choices

[joe_peters]

I doubt it'll matter at all - the transfer case (at least in a 231, a 242 may be different) has no clutches/friction materials, just gears, so it really is not picky as long as it's approximately the right viscosity and has some detergents in it. I usually use dex III as I keep a cheap 5qt container of that around for the transfer case and making penetrating lube.

Listen to Kastein on this, he has it right.