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Borg Warner 1339 transfer case oil

KarlVP

Not Sure
Joined
May 19, 2020
Member Number
381
Messages
1,331
Loc
Crusty's Brewing, Wa
I got a BW 1339 for my 75 fullsize cherokee project. I know it states to put TCL-1 fluid in there. Other articles I have read state you can put 30 weight motor oil in there with a friction additive. Will lucas oil 75-90 work in the case? I have some and it's good stuff. FWIW I have a complete spare case to try this on, I just don't want to blow it up from the get go.

Also this will be a mostly street driven rig (for now) with mild forest road and snow wheeling trips.
 
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