Red Line 75W-90NS GL-5 Gear Oil (no friction modifier) 75W90NS is designed for transmissions and transaxles – helps to slow synchros for easier shifting across a broad temperature range Popular in Ferrari, Porsche and Subaru transaxles Muscle Car applications like Ford Top Loader, Muncie transmissions, Borg-Warner T-10 and Super T-10 Contains extreme pressure additives like our 75W90 GL-5 oil, but lacks friction modifiers to balance slipperiness Improved copper corrosion protection to prolong synchro life Helps with lock-up on weak limited-slip differentials-compatible with Red Line Limited Slip Friction Modifier for tuning slippage Also used with clutch-type LSDs in racing for maximum lock up Recommended for API GL-5, GL-6, MT-1, MIL-L-2105E and SAE J2360 Non corrosive formula, safe for use with all synchro materials PRODUCT DETAILS: Since most GL-5 gear oils for differentials are too slippery for manual transmissions, Red Line offers these products that ensure proper shifting while providing ultimate wear protection 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 MT-LV, MTL, MT-85 & MT-90 are not for use in differentials with hypoid gears Excellent gear and synchro protection, balanced slipperiness for easier shifting in cold climates Excellent for high- and low-mile transmissions Compatible with petroleums and other synthetics TYPICAL PROPERTIES API Service Class GL 5 SAE Viscosity Grade (Gear Oil) 75W90 Vis @ 100°C, CSt 15.6 Vis @ 40°C, CSt 89 Viscosity Index 185 Pour Point, °C -45 Pour Point, °F -49 Brookfield Viscosity @ -40°C, Poise 400 @-40°C