SMART BLEND SYNTHETICS ONE FORMULA Limited Slip Differential Supplement with Advanced SYNTEUM technology,is specially formulated to be added to all limited slip differentials.ONE FORMULA Limited Slip Differential Supplement provides superior protection of clutch surfaces and internal components,while reducing operating temperatures and eliminating noise & chatter.ONE FORMULA Limited Slip Differential Supplement provides the correct frictional profile to transfer power and ensure proper clutch operation within limited slip differential units.