GL-5 85W-90 Transmission Oil is a high-performance gear lubricant designed for heavy-duty manual transmissions, differentials, and axles. It provides excellent protection against wear, rust, and corrosion under high pressure and extreme load conditions. The "85W-90" indicates good flow in cold temperatures (85W) and reliable protection at high operating temperatures (90). Ideal for hypoid gears and recommended where API GL-5 is specified.