About Redline MT90 75w-90. Popular in Nissan, Toyota, Mitsubishi and Mazda manual transmissions and transaxles as well as other selected applications, this is a 75W90 GL-4 Gear Oil that is slightly heavier than REDLINE MTL. Provides excellent protection of gears and synchronisers, and its balanced slipperiness provides a perfect coefficient of friction, allowing easier shifting. IDEAL for Mitsubishi EVO Gearbox.Red Line Transmission Lubricants are designed to provide excellent low-temperature shiftability and improved gear protection at higher temperatures. 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 transmission oils to carry higher loads compared to petroleum lubricants. The stability of these products allow them to be used for extended periods. MTL® can be used in most manual transmissions and transaxles for both street and racing use unless the manufacturer requires the additional protection of an SAE 90 or the extreme-pressure protection of a GL-5. In those situations the MT 90 (GL-4) or 75W90NS (GL-5) will provide good shiftability and synchro compatibility and extra gear protection. Limited-slip transaxles may require the 75W90 Gear Oil to prevent limited-slip chatter. 75W140NS is designed to help reduce the noise in noisy transmissions and transaxles, while still allowing good low-temperature shiftability. D4 ATF and High-Temp ATF provides the gear protection of a GL-4 gear oil in an automatic transmission fluid, which is far superior to a conventional ATF. This gear protection makes it perfect for lubricating automatic transaxles and high-performance automatic transmissions. The D4 ATF provides the best lowtemperature shiftability. MTL® provides better wear protection in most manual transmissions which call for an ATF which can be very important in racing applications. MTL® provides the lowtemperature properties equivalent to a petroleum ATF. All Red Line transmission lubricants provide excellent synchronizer compatibility. Red Line Transmission Lubricants are designed to provide excellent low-temperature shiftability and improved gear protection at higher temperatures. 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 transmission oils to carry higher loads compared to petroleum lubricants. The stability of these products allow them to be used for extended periods. MTL® can be used in most manual transmissions and transaxles for both street and racing use unless the manufacturer requires the additional protection of an SAE 90 or the extreme-pressure protection of a GL-5. In those situations the MT 90 (GL-4) or 75W90NS (GL-5) will provide good shiftability and synchro compatibility and extra gear protection. Limited-slip transaxles may require the 75W90 Gear Oil to prevent limited-slip chatter. 75W140NS is designed to help reduce the noise in noisy transmissions and transaxles, while still allowing good low-temperature shiftability. D4 ATF and High-Temp ATF provides the gear protection of a GL-4 gear oil in an automatic transmission fluid, which is far superior to a conventional ATF. This gear protection makes it perfect for lubricating automatic transaxles and high-performance automatic transmissions. The D4 ATF provides the best lowtemperature shiftability. MTL® provides better wear protection in most manual transmissions which call for an ATF which can be very important in racing applications. MTL® provides the lowtemperature properties equivalent to a petroleum ATF. All Red Line transmission lubricants provide excellent synchronizer compatibility.