The owners manual for my 2002 Montaro says use SAE 75W90 in the transfer. Are these cases gear driven and not chain drive? I thought all Transfer's now days were chain drive. Every other 4WD I own uses ATF of some kind. 1993 Jeep Cherokee, 2003 Dodge Cummins 4WD, 1946 Willis Jeep (gear driven), this also uses 75W90. I was just wondering.
Thanks Oldhat

 

I believe all v6 models are gear driven transfer cases and use standard gear oil. I know earlier 2.6L I-4 gas models were chain driven. Gear driven is preferable because you don't have chain wear and replacement issues.

Also, if you're interested, our Aussie friends are producing "custom/low volume production" lower transfer case gearing for the Gen I V6 Auto Tranny transfer cases. Not sure if the xcases are the same in MT rigs. These gears will not work in the 3.5L DOHC x cases but they are also making a gear set for the 3.5L DOHC models.

 

Thank you for the Info. I would much prefer the geer drive over the chain drive for strenth and ability to last longer.

 

Well, don't you worry. I have yet to hear of someone breaking their gear driven transfer case and I'm among many owners who actually wheel our montero's on some of the harshest rock crawling trails (Rubicon, Fordyce, Dusy Ersham, etc) where vehicle breakage is not just common, but expected. Fortunately, as I'm sure you've found, mitsu 4x4's are fairly stout so it hasn't really been a major problem unless you are trying to do a +4 rated obstacle.