Ford Performance's specially formulated Friction Modifier is a must-have for any gear swaps or fluid flushes on your 1979-2019 Mustang! The purpose of this modifier is to make your gears operate smoothly and quietly. This means no noise and increased durability of your Pony's rear gears.
It is compatible with other brands of gear oil, and it's important to note that one bottle is required for rear ends equipped with Ford Performance traction-lock (Trac-Lok) limited slip differentials. Be sure to have one of these in your tool-box, at home, and on the track!
Note: Only for use with Mustangs equipped w/ Clutch-Type LSD
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