Today I went by Ford and picked up 2 qts of 75W-85 gear lubricant and a 4oz bottle of the Friction Modifier. I thought the differential would have been shipped dry but as I went to pour in the first qt of oil in the fill hole, the oil began pouring out after I had put in maybe 1.75 qts. Obviously the diff wasn't dry, but it wasn't full either. Now I'm not sure what I should do. Should I drain a bit more of the oil and then add the Friction Modifier, and then top it off with oil, or does it already have the friction modifier in there? I would call Ford Performance but they aren't open. Anybody know what the deal is here?