how often
how and how often with what
never bothered with it and need to check it out
i dont have a manual so any maint logs would help
30k mi. or every 2 years light to normal use
T/case at the same time i do my auto tranny as it uses ATF.
Diffs--maybe 30k under heavy use or 60k light use.
don't forget your front bearings, u-joints and anything else greasable in the suspension. these need your attention a lot if you do quite a bit of off roading (wheeling) in mud/water and/or sand.
but under normal use do this twice a year.
front bearings once a year. my book says 30k.
This is what i try to follow.


