As the title says, how often should I change my differential oil? I have a dana 44 in the rear and a dana 30 up front. Is there a difference from front to rear on how often it needs to be done?
Do you have the owners manual? there is a section that tells what fluid to use for each type of differential, if you don't have the owners manual you can request a build sheet from Chrysler
http://www.jeep.com/jeepcares
the front I believe is the same for all axles is 80w-90 GL-5, the rear will vary depending on axle and use - if you have trak-lok it will require and additive
I forget what the schedule is for normal use but I change mine about every 12000 miles (I tow and drive more than average)
found this on the owner CD - I have a 2010 Rubi Unl:
226 RBI (Model 44) - MOPAR® Gear & Axle Lubricant (SAE 80W-90) (API GL-5) or equivalent. For trailer towing, use MOPAR® Synthetic Gear & Axle Lubricant (SAE 75W-140) or equivalent. Models equipped with Trac-Lok™ require an additive.