Red Line 57105 75W140NS GL-5 Gear Oil, 1 Gallon, 1 Pack Contains extreme pressure additives like our 75W140 GL-5 oil Option for noisy transmissions when mixed with 75W90NS or MT-90 to bring viscosity level up 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 Helps with noisy or rough shifting in troubled A-833 Dodge/Plymouth 4-speed transmissions from 1964 to 1969 Recommended for API GL-5, GL-6, MT-1, MIL-L-2105E, and SAE J2360