Max Gear is recommended for truck and automotive differentials, outboard motor lower units or in rear axles or manual transmissions requiring an API fluid. Max Gear virtually eliminates both gear and bearing wear-even under severe squeeze film conditions caused by extremely high loads, sudden shock loads or low RPMs. Gears run smoother, quieter, cooler and longer without overhauls. It is noncorrosive to both ferrous and nonferrous metals. Maximizes horsepower. Extends gear and bearing life. Reduces operating temperature. Lower coefficient of friction. Superior corrosion protection. Separates rapidly from water. For use with open, limited-slip and locking differential. Contains limited-slip friction modifier 75W90 6 Quarts.