"WARREN UNILUBE" PREMIUM TRACTOR HYD FLUID : Size: 5 gallon. A blend of highly refined base oils and superior additives designed to lubricate the transmission. Differential and final drive gears and serve as a hydraulic medium, power steering fluid, power brake and power take-off fluid in farm tractors. Excellent extreme pressure and antiwear properties and provides outstanding resistance to rust, corrosion and oxidation. Contains an antifoam additive to aid in suppressing foam during use.