Redline MT-90 MT-90 Manual Transmission Lubricant; a 75W90 GL-4 gear oil designed for use in manual transmissions and transaxles. Provides excellent protection of gears and synchronizers and its balanced slipperiness provides a perfect coefficient of friction, allowing easier shifting. BENEFIT SUMMARY * Eliminates notchy shifting. * Designed for manual transmissions and transaxle.s * Perfect synchronizer coefficient of friction. * Enables high-speed downshifting. * Excellent shifting even when cold. * Eliminates gear whine and rattle at high temperatures. * High-performance gear protection. * Non-corrosive toward synchronizers. * Satisfies manual transmissions and transaxles requiring motor oils or GL-1, GL-3, or GL-4 gear oils. Red Line Gear Oils and Transmission Lubricants are designed to provide excellent low-temperature shiftability and improved gear protection at higher temperatures. Red Line Gear Oils will reduce differential temperatures 10-70�F. Efficiency improvements between 1-5% are typical. The synthetic base stocks used have tremendous thermal stability and provide the best film strength available. The unique combination of base stocks and additives allow Red Line gear and transmission oils to carry higher loads compared to petroleum lubricants. The stability of these products allow them to be used for extended periods.