Red Line 75W140NS GL-5 Gear Oil - Single Quart

Similar to 75W140, Red Line 75W140 NS GL-5 Gear Oil contains extreme pressure additives, but lacks friction modifiers to balance slipperiness. Popular for historic and vintage transmissions, like Mid-1930s to early-1950s synchro-equipped gearboxes in cars and trucks, It is also used as an option for noisy transmissions when mixed with 75W90NS or MT-90 (to bring viscosity level up) and can also used in clutch-type limited slip differentials in racing for maximum lock up (some users add Limited Slip Friction Modifier in small doses to customize slippage).