Originally Posted by
mrradio
Last thing I want is to screw up the differential.
Then don't worry so much about the specific product, think more about changing it every 75,000 miles or five years, whichever comes first.
I am **** about 229.3 approved engine oils, but Im not all the concerned about the differential - it's a differential. 75w/85 maybe up north, 75W/90 here in the south.