tranfer case oil
 

what kind of lube are what weight goes in the transfer case does any one know ???

atf

Since your signature is not filled in, and you did not identify your truck, it's hard to say.

trans fer case lube
 

sorry I have a 2012 2500 big horn 6.7 . been dig-gen as long as the atf is +4 are equivalent. will that work?

Since it's a 2012, ATF+4 should be the correct fill.

The 2013 & newer trucks use a BW44-44 fluid....68089195AA.

Do you fill them with the transmission since it is attached or do they drain and fill separately?

Two separate systems, and two separate reservoirs. One word of advice----when doing a transfer case service, always make sure one can remove the FILL plug prior to removing the DRAIN plug.

thank's for the advise
 

got my transfer case lube changed and my signature filled in as well