Red Line 75W85 GL-5 Synthetic Gear Oil - 1 Quart

Red Line 75W85 GL-5 Synthetic Gear Oil - 1 Quart

High-Efficiency Protection for Modern Hypoid Differentials

Give your drivetrain the edge with Red Line 75W85 GL-5. This lubricant is the preferred choice for many modern Toyota, Lexus, and Dodge/Jeep applications where a 75W85 viscosity is required to optimize fuel economy while maintaining API GL-5 levels of extreme-pressure protection. Formulated with polyol ester base stocks—the same used in jet engines—this oil provides exceptional film strength and shear stability. It stays thick enough to protect gear teeth under heavy torque but remains fluid enough at low temperatures to ensure smooth, immediate lubrication during cold starts.

What’s Included in the Box:

- (1) 1 Quart (0.946L) Bottle: Features a standard neck compatible with most common fluid pumps.

The Red Line Advantage

- Polyol Ester Base Stocks: Provides superior film strength and heat resistance compared to petroleum or lesser synthetic lubricants.

- Improved Fuel Economy: The 75W85 viscosity reduces internal friction and "churning losses" within the gearbox, leading to better efficiency.

- Integrated Friction Modifiers: Contains the necessary additives for most Limited-Slip Differentials (LSD), eliminating chatter and vibration without the need for additional "stop-leak" style additives.

- Extreme Pressure (EP) Performance: API GL-5 rated to handle the intense sliding pressures found in hypoid gear sets and high-torque truck differentials.

- Exceptional Cold Flow: The high viscosity index allows for easier shifting and lower drag in freezing climates, protecting your seals and gears from the moment you move.

Product Specifications

- Part Number: 50104

- Viscosity Grade: SAE 75W-85

- Standard: API GL-5, GL-6, MT-1

- Flash Point: 227 degrees C / 440 degrees F

- Pour Point: -45 degrees C / -49 degrees F

- Viscosity at 100 degrees C: 11.5 cSt

- Viscosity Index: 171

Precision Tip: While this fluid contains friction modifiers for most limited-slip differentials, some highly sensitive clutch-type LSDs may still require a small amount of additional Red Line Limited Slip Friction Modifier if chatter persists. Conversely, if you are using this in a manual transmission where the shifts feel too slippery, you may want to look into Red Line’s "NS" (Non-Slip) series. Always verify your capacity; most rear differentials on modern trucks and SUVs require 2 to 4 quarts.