Red Line Oil 57906 Synthetic Gear Oil

Red Line Synthetic Gear Oil delivers maximum protection and efficiency for drivetrains across automotive, commercial, and racing applications. Formulated with advanced polyol ester base stocks, this premium lubricant excels under extreme high-load and high-temperature conditions, providing superior wear protection and reduced operating temperatures in hypoid gears.

Key Benefits:

• Polyol ester formulation provides exceptional lubricity to minimize sliding friction and wear
• Natural multigrade properties ensure stable viscosity over extended service intervals
• Effective across wide temperature ranges for year-round performance
• Available in formulations optimized for differentials, transmissions, and transaxles
• Limited-slip compatible versions include friction modifiers to prevent chatter

Available Viscosity Grades:

75W90: The most popular option for car and light truck differentials, both conventional and limited-slip. Preferred for most racing applications. Contains friction modifier for limited-slip units. Exceeds API GL-5 specifications. Also suitable for many manual transmissions and transaxles.

75W140: API GL-5 rated for street-driven vehicles where heavier viscosity is specified by the manufacturer. Excellent performance in conventional and limited-slip differentials. Popular in late-model Ford truck rear differentials and similar applications.

80W140: Formulated for commercial trucks operating on long, steep grades and select racing applications. Ideal for differentials and transmissions experiencing excessive noise or limited-slip units with corner chatter. Exceeds API GL-5 specifications.

75W90 NS (Non-Slip): GL-5-type oil without friction modifiers. Enables faster synchronizer engagement for quicker, easier shifting, especially in cold temperatures. Can be used in racing limited-slip differentials with weak spring designs.

75W140 NS: Heavier viscosity GL-5-type oil without friction modifiers for broader load and temperature ranges. Faster shifting characteristics and improved cold-weather operation. Suitable for racing limited-slip applications with weak spring designs.

SuperLight Gear Oil: Friction-modified 75W75 GL-5 equivalent designed for applications requiring lighter viscosity. Popular in motorcycle applications as an alternative to ShockProof formulations. Superior cold-temperature flow and synchro compatibility. May be used in racing differentials not experiencing high temperatures.

LightWeight Gear Oil: Friction-modified 75W80 GL-5 equivalent for lighter-duty applications. Excellent for motorcycles and certain performance applications. Outstanding cold-weather shifting and synchro compatibility. Suitable for racing differentials in moderate-temperature environments.

Limited Slip Friction Modifier: Compatible additive for petroleum or synthetic gear oils. Reduces differential break-in friction and lowers break-in temperatures by up to 50°F. Add only enough to eliminate limited-slip or posi-traction chatter without over-lubricating clutch plates.

Red Line Synthetic Gear Oil provides the protection and performance demanded by enthusiasts, racers, and professional applications where drivetrain reliability is critical.