Red Line 75W90 NS GL-5 Gear Oil * 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, Borg-Warner T-10 and Super T-10, and Muncie transmissions * Contains extreme pressure additives like Red Line's 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