GL-4 Conventional 80w90 Gear Oil Quart

The GL-4 Conventional 80w90 Gear Oil Quart is a specialized lubricant designed for manual transmissions and transaxles that require a specific additive package to protect yellow metals like brass and bronze. This conventional formula provides the essential shear stability and load-carrying capacity needed for older or high-performance drivetrains where modern GL-5 fluids might be too aggressive. By choosing a dedicated GL-4 lubricant, you ensure that synchronizers and bushings remain protected from chemical corrosion while maintaining smooth shifting performance.

Engineered by Driven Racing Oil, this 80W-90 weight lubricant utilizes high-quality base oils to deliver consistent viscosity under varying thermal loads. The conventional chemistry is specifically balanced to provide the necessary friction coefficient for optimal synchronizer engagement, which prevents grinding and premature wear during gear changes. Its formulation focuses on extreme pressure protection without the high sulfur content found in many GL-5 oils, making it the ideal specification for vintage gearboxes and specific industrial applications.

This GL-4 Conventional 80w90 Gear Oil Quart is packaged in a convenient 1-quart bottle, making it easy to manage fluid swaps in standard automotive or light-truck differentials and gearboxes. Before you buy, verify your vehicle's specifications to ensure a GL-4 rating is required, as this fluid is specifically tailored for components that rely on non-corrosive additives for longevity. Whether you are performing routine maintenance or a complete rebuild, this lubricant offers the reliable protection necessary for high-torque environments.