Review on 🏎️ Enhanced Performance Ford Racing M-19546-A12 Differential Friction Modifier - Convenient 3.8 oz. Bottle by Ralph Gerry

This is a must have for anyone working on the Ford Trac-Loc Rear. I had my differential oil changed at a shop that didn't use it and after about a month I was having severe rear end shaking when cornering at low speed and squeaking when cornering after driving on the freeway curve drove. All of these symptoms indicate the wear of clutch packs without a friction modifier. I bought a bottle of this crap, stuck it in the rear differential and the symptoms immediately subsided and then went away completely.