Valvoline"s High Performance Gear Oil is a thermally stable, extreme-pressure gear lubricant that withstands severe temperatures and shock loading while providing excellent anti-wear, anti-scuffing and corrosion protection. It is recommended for all hypoid differentials (conventional and limited slip) and manual transmissions in passenger cars, light trucks, sport utility vehicles, vans, and heavy-duty trucks where an API-GL5 or MT-1 fluid is specified. Great for high speed, high torque, and high horsepower conditions. Meets and exceeds the performance requirements of major manufacturers for Ford M2C108-C; Ford M2C197-A, Mack GO-H/GO-J; U.S. Mil. Spec. MIL-PRF-2-2105E and API Services GL-5; MT-1.