75W140NS GL-5 Gear Oil Case 4x1 Gallon

The Redline Oil 75W140NS GL-5 Gear Oil Case 4x1 Gallon is engineered for high-performance differentials and manual transmissions that demand extreme pressure protection and thermal stability. Built for enthusiasts who modify their vehicles with aggressive gear ratios, limited-slip differentials, or track-focused powertrains, this full synthetic oil addresses the punishing demands of modern performance driving.

Whether you're running a tuned rear end, upgrading to numerically lower gearing for acceleration, or maintaining a built transmission under sustained load, 75W140NS provides the film strength necessary to prevent gear scuffing and metal-to-metal contact that can destroy expensive drivetrain components. This GL-5 rated synthetic gear oil features Redline's proprietary anti-wear and anti-scuff additives, formulated to handle shock loads that conventional petroleum oils cannot tolerate.

The 75W viscosity grade flows at cold start, reducing parasitic drag and heat generation during warm-up, while the 140 weight maintains a robust film at operating temperature and under extreme shear stress from hypoid gears. The "NS" designation indicates no sulfur, ensuring compatibility with vehicles equipped with bronze or soft-metal gear components without causing corrosive wear. Each gallon in this four-gallon case is precisely blended and sealed for long shelf life, making it ideal for shops, fleet builders, or serious DIY mechanics who service multiple vehicles.