Pro-ride Motorsports

Redline MT-90  Manual Transmission & Trans-axle Lubricant 75W-90 GL-4 All Synthetic Formula RED LINE SYNTHETIC MT-90 is specially designed for manual transmission and trans-axles.  The relatively constant viscosity over a wide temperature range allows easier shifting and helps prevent whine and rattle at high temperatures.  Most gear oils, ATFs, and motor oils are too slippery for proper synchro engagement - which causes gear clash when shifting.  Most GL-5 gear oils contain reactive sulfur which can chemically wear synchros and shorten synchro life by 50% compared to Red Line MT-90.  MT-90 has a coefficient of friction which is perfect for rapid synchro engagement and allows high-speed up-shifting and down-shifting.  MT-90 is recommended for manual transmission and front-wheel drive manual transaxles which recommend motor oils, or GL-1, GL-3 or GL-4 gear oils.  Petroleum multigrade motor oils and transmission fluids contain polymers w...

Red Line Synthetic Oil! Feels the different 75W-90 GL-4 Gear Oil (similar to SAE 5W40/10W-40 engine oil viscosity) Popular in Nissan, Mazda, Mitsubishi, VW/Audi, Lotus Elise/Exige, Toyota Offers quicker shifts, perfect synchronizer coefficient of friction Safe for brass synchros, as it lacks of reactive sulfurs found in most GL-5 oils that cause damage High performance gear protection and longer synchro life Eliminates notchy shifting, even when cold Satisfies the gear oil viscosities of SAE 40, 10W-40, and 15W-40 Recommended for GL-1, GL-3, and GL-4 applications, as well as where most special synchromesh fluids are specified ABOUT RED LINE GEAR OIL FOR MANUAL TRANSMISSIONS Appropriate coefficient of friction for most manual transmission synchronizers (other's synthetic gear oils are often too slippery for proper synchro engagement) Red Line Offers lubricants to pinpoint nearly every transmission application MTL, MT-85 & MT-90 are not for use in differentials with hypoid gears ...