[Stocker]

I heard years ago you can use either gear oil or ATF in NP205 or 208 transfer cases. My Clymer manual calls for Dexron II in both of those. However, I have Mobil 1 75W-90 in my NP205, which I put in before the manual was given to me.

There is a seal between the TH350 and the TC -- if it is leaking (as mine once was), it will force ATF from the trans into the TC, overfilling it.