75W140NS GL-5 Gear Oil 1 gallon

The 75W140NS GL-5 Gear Oil in a 1-gallon jug is specifically formulated for high-performance manual transmissions, differentials, and transfer cases that require GL-5 rated oil for extreme pressure protection and thermal stability. This synthetic gear oil is ideal for drivers operating heavily modified vehicles, track-focused builds, or any powertrain under sustained load and heat.

The 75W140NS formulation utilizes a non-sulfur (NS) additive package that effectively prevents corrosion of brass synchronizers and soft metals commonly found in precision gearboxes. This oil provides superior film strength under shock loads generated by aggressive driving conditions, ensuring smooth operation during cold starts and maintaining a protective barrier between gear teeth and bearing surfaces at operating temperatures.

Enthusiasts and mechanics who work with limited-slip differentials, locking differentials, or heavily loaded ring-and-pinion sets will find this gear oil essential for preventing chatter and wear while ensuring optimal performance. Its synthetic base stock resists oxidation and viscosity breakdown, extending drain intervals and protecting against varnish buildup that can compromise shift quality.