Torco Type F Limited Slip Additive Bottle - 4 ounce is formulated for use in limited-slip and posi-traction differentials to reduce hypoid gear noise and chatter. The formulation of Torco Limited Slip Additives modify the clutch plate friction for applying and releasing clutch plates. It is recommended for use in GM limited-slip and posi-traction applications only. The treatment level is 2 percent to 6 percent by volume.