Valvoline HD TDL 75W-90 is a synthetic Total Driveline (TDL) oil engineered for the complete drivetrain of heavy-duty commercial vehicles, including both transmissions and differentials. This advanced lubricant eliminates the need for separate transmission and differential oils, simplifying maintenance procedures and reducing lubricant inventory for fleet operations.

Designed for heavy-duty conditions, HD TDL 75W-90 delivers exceptional performance in both conventional and ultra-modern transmission and differential designs. Its synthetic formulation provides outstanding thermal stability, resisting oxidation and viscosity breakdown during extended service intervals even in the most demanding operating environments. The oil maintains consistent lubricating properties across a wide temperature range, from cold-weather startup to sustained high-temperature operation under heavy loads.

The 75W-90 viscosity grade ensures excellent low-temperature fluidity for easy shifting and immediate lubrication during cold starts, while providing robust film strength at high temperatures to protect heavily loaded gears and bearings. This balance of properties results in smooth, precise shifting performance and reliable drivetrain protection year-round.

Key performance benefits include superior extreme-pressure protection for spiral bevel and hypoid gear sets, excellent wear protection for synchronizer rings and clutch packs, strong corrosion and rust inhibition, effective foam resistance, and reliable seal compatibility. The oil meets both GL-4 and GL-5 performance requirements, making it truly universal across all drivetrain components.

HD TDL 75W-90 is recommended for heavy-duty trucks, buses, trailers, and off-highway equipment. It is an ideal solution for fleet operators who want to consolidate their drivetrain lubricant inventory into a single, high-performance product that delivers consistent protection across transmissions, transfer cases, and differentials in the most demanding commercial and industrial applications.