TO-4 Fluid SAE 50 is a high-performance transmission and drive-train lubricant designed to meet the requirements of Caterpillar’s TO-4 specifications. TO-4 Fluid SAE 50 is engineered to optimize the performance of powershift transmissions, gearboxes, and final drives. TO-4 Fluid SAE 50 contains an advanced additive system to deliver the precise performance parameters needed to maximize the productivity of construction, quarrying, and mining equipment operating in severe conditions.