Lucas Heavy Duty Transmission & Drive Train Oils are formulated to meet Caterpillar TO-4 specification as well as Allison C-4 and Komatsu Micro-Clutch specifications. They’re designed for use in Caterpillar power shift transmissions, clutches, brakes, final drives, bevel gears and differentials. The oils are formulated with unique Lucas Oil additive systems to provide the highest performance for extended oil life. They minimize foam, provide excellent copper corrosion and rust protection and have excellent low temperature properties, shear and oxidative stability.