CarbonSteel
Well-Known Member
Based upon the UOA results of the oil that I changed at 5,000 miles and considering the small capacity of the axle (1.5QTs in the rear), I would definitely change the it. I would recommend using 75W-110 in the front axle because it is the upper viscosity that 75W-90 was before the SAE J306 tables were updated some time ago. I would also use 75W-140 in the rear axle particularly if you will be towing or performing some other heavy duty use.This is my first Jeep and have been loving the process of learning to do a lot of the PM tasks myself. So far I have done every oil change and tire rotation myself. I am currently at just over 33,000 miles. Should I be swapping out the differential fluid in the near future?
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