Valvoline TDL 75W-90 is a synthetic technology Total Driveline (TDL) lubricant designed to protect the entire drivetrain of heavy-duty commercial vehicles in a single, versatile product. This advanced gear oil is suitable for both transmissions and differentials, simplifying lubricant inventory and reducing the risk of using an incorrect fluid in critical drivetrain components.

Formulated for heavy-duty transmissions and differentials operating under severe conditions, TDL 75W-90 provides exceptional extreme-pressure (EP) protection that prevents gear tooth wear, pitting, and scuffing even under the highest loads. Its synthetic technology base ensures outstanding thermal stability, resisting oxidation and viscosity breakdown during extended service intervals and in high-temperature operating environments.

The 75W-90 viscosity grade delivers excellent low-temperature fluidity for easy cold-weather shifting and immediate lubrication at startup, while maintaining adequate film strength at elevated temperatures to protect heavily loaded gears and bearings. This wide operating range makes TDL 75W-90 effective year-round without the need for seasonal fluid changes.

Key benefits include superior wear protection for both spiral bevel and hypoid gear sets, smooth and precise shifting performance in manual and synchronized transmissions, excellent seal compatibility to prevent leaks, and strong corrosion protection for internal metal surfaces. The oil also exhibits excellent resistance to foaming, ensuring consistent lubrication under high-speed and high-load conditions.

TDL 75W-90 is recommended for use in heavy-duty trucks, buses, trailers, and off-highway equipment where the manufacturer specifies GL-4 and/or GL-5 lubricant performance. It is a proven solution for fleet operators seeking a single total-driveline oil that delivers reliable protection across all drivetrain components.