oils

I use Lucas 75w140 in rear diff and gearbox, Lucas 75w90 in front diff and Rotella t-6 in the engine.

Royal purple all the way.. 5w-30 in engine, 75-140 in everything else (diffs and gear case)

Amsoil all the way...If you or anyone is interested in getting amsoil at wholesale send me a PM

Doesn't matter what oil, as long as no water gets in. Synthetics preferred though.

NoFlyZone54 said:

Royal purple all the way.. 5w-30 in engine, 75-140 in everything else (diffs and gear case)

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You put 140 in the front diff? I did then got scared something was going to happen so switched back to 90.

Yes sir.. I run 140 in the diffs and gear case.. Simply because it's easier and usually when I'm in 4wd it's pinned WOT.. So figured why not.. I've had it like that forever now.
I change my fluids every 3-4 rides depending how extensive the rides are. For safe measures and everything looks good so far when I drain everything.