Diff fluid change?
04-18-2017, 11:02 AM
#1
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Model: Cherokee
Diff fluid change?
I have a 98 XJ with 3" lift and 31s. Changing fluid for 1st time since purchased and not sure what previous owner did. Dana 30 in front and 8.25 in rear. Should I run 75w140 in both the rear and front since lifted with 31 tires? Matter what brand? I've done a lot of searching and couldn't find a real good answer for this so anyone's experience will be much appreciated.
04-19-2017, 01:41 PM
#6
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Owners Manual says to use 75w-90 unless towing then use 75w-140 synthetic in the rear axle. API index of GL-5 is indicated. Friction modifier is indicated for axles with Trac-Loc.
My 1998 FSM says 80-90 gear oil for standard use. For heavy duty use/towing 75w-140 synthetic is indicated both front and rear. Again GL-5 and friction modifier if you have LSD.
The recommend interval for changing gear oil is 12,000 miles in heavy duty/towing operations or change immediately after operating vehicle in water above the axles.
My 1998 FSM says 80-90 gear oil for standard use. For heavy duty use/towing 75w-140 synthetic is indicated both front and rear. Again GL-5 and friction modifier if you have LSD.
The recommend interval for changing gear oil is 12,000 miles in heavy duty/towing operations or change immediately after operating vehicle in water above the axles.