Red Line MT-90 75W90 GL-4 GEAR OIL

Red Line MT-90 75W90 GL-4 Gear Oil - Full Synthetic Manual Transmission Fluid

Upgrade your manual transmission with Red Line MT-90 75W90 GL-4 Gear Oil. This full synthetic fluid provides superior gear protection, eliminates notchy shifting, and is safe for brass synchros. Ideal for a wide range of vehicles, including Nissan, Mazda, Toyota, and more.

Red Line MT-90 75W90 GL-4 Gear Oil is a premium, full-synthetic, ester-based lubricant specifically engineered for manual transmissions and transaxles. It is formulated to provide an optimal balance of film strength and slipperiness, ensuring maximum wear protection without being so slick that it hinders proper synchronizer function. The 75W90 viscosity rating is similar to an SAE 5W40 or 10W40 engine oil, making it suitable for a wide range of applications. Unlike many GL-5 gear oils, MT-90 is specifically designed for GL-4 applications. It lacks the reactive sulfurs that can corrode and damage soft yellow metals like the brass synchronizers found in many manual transmissions. This makes it a perfect choice for those seeking to protect their gearbox's internal components and extend their lifespan. The shear-stable formula of MT-90 resists viscosity breakdown under high stress and heat, ensuring consistent performance. It significantly improves shifting feel, especially in colder temperatures, by eliminating the "notchy" or difficult shifting that often occurs with other fluids. Whether you have a high-mileage transmission in need of improved shifting or a new one you want to protect, Red Line MT-90 provides excellent performance and protection.

Best Uses

1. Manual Transmissions & Transaxles: Ideal for manual transmissions and transaxles that require a GL-4 fluid.
2. Specific Vehicle Makes: Popular in a variety of vehicles, including Nissan, Mazda, Mitsubishi, VW/Audi, Lotus Elise/Exige, and Toyota transmissions.
3. Fixing Shifting Issues: Excellent for resolving "notchy" or difficult gear shifts, particularly when the transmission is cold.
4. Protection of Brass Synchros: A top choice for vehicles with brass synchronizers, as it is non-corrosive to these components.
5. High-Performance and Daily Driving: Suitable for both performance-oriented applications and standard daily drivers looking for improved longevity and shift quality.

 Key Features

1. Full Synthetic, Ester-Based Formula: Provides superior lubrication, thermal stability, and wear protection compared to conventional oils.
2. GL-4 Specific: Formulated to meet the specific requirements of GL-4 manual transmissions, ensuring proper synchronizer function.
3. Non-Corrosive to Yellow Metals: Safe for brass and other soft metal synchronizers, preventing the damage that can be caused by reactive sulfurs in GL-5 oils.
4. Optimized Viscosity: A 75W90 gear oil viscosity that offers a balanced slipperiness for smooth shifting in a wide range of temperatures.
5. Shear Stability: The formula resists viscosity breakdown under high stress, maintaining consistent performance and protection over its service life.

 Key Benefits

1. Eliminates Notchy Shifting: Provides a perfect coefficient of friction for synchronizers, resulting in quicker and smoother shifts, even when cold.
2. Increased Gear and Synchro Life: High-performance gear protection reduces wear and tear on internal transmission components, extending the life of the gearbox.
3. Improved Cold Shifting: The fluid's stable viscosity in cold temperatures makes for a much easier and more enjoyable driving experience from the moment you start the car.
4. Compatible and Versatile: Can be used in GL-1 and GL-3 applications and is compatible with petroleum-based and other synthetic lubricants.
5. Reduced Gear Noise: The consistent viscosity and strong film strength help to minimize gear noise, contributing to a quieter and more refined driving experience.