Gear Oil 80w90 GL-4 1 Quart

Richmond Gear Oil 80W90 GL-4 is a conventional hypoid gear lubricant designed for manual transmissions, differentials, and transfer cases in trucks, SUVs, and performance vehicles. This single-quart container is engineered to provide robust film strength and thermal stability, essential for protecting gears under sustained load and shock.

The 80W90 viscosity rating ensures multi-season performance, with the 80-weight cold-flow characteristic facilitating smooth shifts during winter startups, while the 90-weight hot rating maintains a protective film across gears operating at high speeds. Richmond's formulation includes anti-wear additives and corrosion inhibitors that help minimize gear tooth pitting and bearing corrosion, crucial for high-load scenarios like towing trailers or climbing grades.

This product is particularly beneficial for owners performing preventive maintenance on manual transmissions, as the GL-4 classification prioritizes gear protection, making it safe for bronze and copper synchronizer components found in modern transmissions.