75W-80 GL4 is a semi-synthetic gear oil formulated with high-quality synthetic and mineral base oils. It contains additives that provide high-pressure resistance, prevent oxidation of the oil, protect materials from rust, and reduce wear. It is designed for heavy-duty conditions in differential, manual transmission, and hypoid gears. This oil is formulated for equipment with hypoid gears operating under high-speed/impact loads, high speed/low torque, and/or low speed/high torque conditions. It is suitable for use in heavy-duty axles and final drive axles that require API GL-5 level performance, light and heavy-duty trucks, commercial vehicles, and industrial, commercial, and automotive applications with gears operating under medium to heavy working conditions.