Red Line ® 75W140 NS GL-5 Full Synthetic Gear Oil contains extreme pressure additives necessary for ultimate protection of road cars and racing vehicles, as well as friction modifiers (except NS) for proper limited-slip operation. 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.

• Formulated without friction modifiers to balance slipperiness
• Popular for historic and vintage transmissions, like Mid-1930s to early-1950s synchro-equipped gearboxes in cars and trucks
• Helps with noisy or rough shifting in troubled A-833 Dodge/Plymouth 4-speed transmissions from 1964 to 1969
• Option for noisy transmissions when mixed with 75W90NS or MT-90 to bring viscosity level up
• Non corrosive formula, safe for use with all synchro materials