A quality gear lube of the proper viscosity is the first line of defense against wear, which can be greatly enhanced with a modern anti-friction compound like Justice Brothers Gear Oil Treatment. The high-tech additive contains Justice Brothers' JB Metal Conditioner, which bonds to the metal surfaces and helps manual transmissions and gearboxes run smoother, cooler and quieter for improved gear and bearing life. Gear Oil treatment also helps to resist corrosion, which is especially important in harsh climates or severe-duty vehicles.