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Hi All, Looking for some input from other users here. A while ago I did a full differential fluid change. I filled it with the recommended type (75W-140 Motorcraft, no modifiers in oil) and amount and added the recommended 4oz of Ford XL-3 friction modifier. Everything seemed alright but I...

Hey all, I am seeing some conflicting information on this and was looking for some input. I just changed out my rear differential fluid on my 2003 Ford Explorer Sport XLT (8.8 rear end). The manual says to fill it between 5.5-5.8 pints (2.75-2.9 quarts) as well as adding a friction modifier...