Differential Fluid change

Thomas95SC

Registered User
I'm going to remove the back cover off my diff to flush and change the fluid in it. The car has approx. 110,000 miles on it and I dont think its ever been done. I bought some Valvoline Synthetic 80w-90w gear oil. I have an open diff. with traction assist and was wondering if im suppose to add any kind of friction modifier to it? I didnt see it in any of the parts store. I seen some posts about adding it in when I did a seach but im not sure if I need to use it on my car?????
 
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