Which diff and trans case oil?

[bradleyheathhays]

'96 XJ here and I'm changing out my rear diff and transfer case gear oils for the first time and have a couple questions.

Looks like both the diff and transfer case use about 3 qts of oil each and I have two different kinds (3 qts each)...

The Master Pro is from O'Reiley's

Are these two oils ok to use? Since the XJ has an open differential I just got the cheap stuff that doesn't say 'for use with limited slip differentials.' $5/qt. vs. about $11.50/qt. Which brand should I put in the transfer case and which in the diff? Or should I take these two back and use something different altogether?

 

[go1lum]

Either is fine for the diff. Tcase takes atf.

 

[md21722]

Transfer case does NOT use gear oil. It uses Dexron ATF like you would put in the transmission. About 1.5 quarts.

Rear differential is about 1.5-2 quarts of gear oil similar to what you have pictured. However, Chrysler recommends 75W-140 SYNTHETIC for severe service (towing, etc) with a Dana 35.

 

[donthelegend]

Re: Re: Which diff and trans case oil?

Either is fine for the diff. Tcase takes atf.

x2

Dex 3/Mercon in the transfer case

 

[md21722]

One other point to mention if this is your first time - from the factory the differential covers took RTV. Some folks prefer to use gaskets because they don't like scraping off RTV.