Gear Oil for Differentials

These products contain the extreme pressure additives necessary for ultimate protection road cars and racing vehicles, as well as friction modifiers for proper limited-slip operation.

  • Fully-synthetic formulas created from polyol ester base stocks, offer excellent lubrication under extreme conditions
  • High viscosity-index (VI) to provide relatively constant viscosity and film thickness with varying temperature change
  • Ester base stocks and friction modifiers provide additional slipperiness to lower operating temperatures by reducing the sliding friction in hypoid gears
  • Superior shear stability and reduced oxidation compared to other synthetics and conventional gear oils
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  • Friction Modifier & Break-in Additive 4 oz (4 oz P/N: 80301)
    • Compatible with both petroleum and synthetic gear oils
    • Reduces break-in temps as much as 50°F
    • Add 1oz at a time to clutch-type limited slip or posi-traction units to eliminate chatter

    About Red Line Gear Oil for Differentials

    • Fully-synthetic formulas created from polyol ester base stocks, offer excellent lubrication under extreme conditions
    • High viscosity-index (VI) to provide relatively constant viscosity and film thickness with varying temperature change
    • Ester base stocks and friction modifiers provide additional slipperiness to lower operating temperatures by reducing the sliding friction in hypoid gears
    • Superior shear stability and reduced oxidation compared to other synthetics and conventional gear oils
    • Exceed API GL-5 specifications
    • Engineered to provide the highest degree of protection and improvement of differential efficiency for better mileage, longer drain intervals, and less wear

    More technical information

    Limited-slip or Positraction units use plates or clutches to provide the proper amount of lock-up to the differential. Slippery lubricants are required to prevent chatter, but too much slipperiness causes excess wheel spin, reducing traction.
    For perfect traction, use Red Line 75W90NS and add the Red Line Limited-Slip Differential Friction-Modifier / Break-In Additive until the chatter disappears.

    Satisfies performance requirements of GM 1052358, Ford M2C118-A, 19B546-MA, Chrysler 4318060 and most imports.

    Recommended Dosage:
    Use 4% for prevention of limited slip chatter in broken-in units (typical one 4 oz. bottle) or 4 to 8% for the break-in of new differentials.

    Red Line Limited-Slip Differential Friction-Modifier / Break-In Additive will significantly reduce the friction during break-in of differentials. High temperatures encountered in break-in
    can destroy the hardening of the gear teeth causing rapid wear of the softened gears. This additive can reduce the break-in temperatures by as much as 50°F, improving break-in conditions. Compatible with petroleum or synthetic gear oils. Red Line Gear Oils already contain this additive (except the NS).

    In non limited-slip racing differentials and quick change units using the Red Line ShockProof Gear Oils an additional 3 to 6% Red Line Limited-Slip Differential Friction-Modifier / Break-In Additive is recommended.

    Add to Cart
    R202.48
  • 80W140 GL-5 Gear Oil (Quart 0.946L) (Quart (0.946L)P/N: 58104)
    • Recommended for API GL-5, GL-6, MT-1, MIL-L-2105E, and SAE J2360
    • Contains additional friction modifiers for suitablity with clutch-type limited slip differentials - for most LSDs, no additional friction modifiers are required
    • This product is not designed for use in manual transmission or transaxles with synchronizers, as its slipperiness may lead to shifting problems
    • Popular in stock car racing differentials and transmissions

    About Red Line Gear Oil for Differentials

    • Fully-synthetic formulas created from polyol ester base stocks, offer excellent lubrication under extreme conditions
    • High viscosity-index (VI) to provide relatively constant viscosity and film thickness with varying temperature change
    • Ester base stocks and friction modifiers provide additional slipperiness to lower operating temperatures by reducing the sliding friction in hypoid gears
    • Superior shear stability and reduced oxidation compared to other synthetics and conventional gear oils
    • Exceed API GL-5 specifications
    • Engineered to provide the highest degree of protection and improvement of differential efficiency for better mileage, longer drain intervals, and less wear

    Typical Properties

    API Service Class GL 5+
    Viscosity Grade SAE 80W140
    Vis @ 100°C, cSt 26
    Vis @ 40°C, cSt 231
    Viscosity Index 144
    Pour Point, °C -40
    Pour Point, °F -40
    Flash Point, °C 224
    Flash Point, °F 435
    Brookfield Viscosity, Poise 500 @ -26°C

    Add to Cart
    R376.00
  • 75W140 GL-5 Gear Oil (Quart 0.946L) (Quart (0.946L) P/N: 57914)
    • Popular for cars and light trucks like Ford Mustang, Ford F-150, Dodge Ram, Toyota Tundra and Sequoia, and Jeep Cherokee
    • Contains additional friction modifiers for suitablity with clutch-type limited slip differentials - for most LSDs, no additional friction modifiers are required
    • This product is not designed for use in most manual transmissions or tranaxles, since the extreme slipperiness may cause synchronizer mesh issues that lead to shifting problems
    • Recommended for API GL-5, GL-6, MT-1, MIL-L-2105E, and SAE J2360

    About Red Line Gear Oil for Differentials

    • Fully-synthetic formulas created from polyol ester base stocks, offer excellent lubrication under extreme conditions
    • High viscosity-index (VI) to provide relatively constant viscosity and film thickness with varying temperature change
    • Ester base stocks and friction modifiers provide additional slipperiness to lower operating temperatures by reducing the sliding friction in hypoid gears
    • Superior shear stability and reduced oxidation compared to other synthetics and conventional gear oils
    • Exceed API GL-5 specifications
    • Engineered to provide the highest degree of protection and improvement of differential efficiency for better mileage, longer drain intervals, and less wear

    Typical Properties

    API Service Class GL 5+
    Viscosity Grade SAE 75W140
    Vis @ 100°C, cSt 27.4
    Vis @ 40°C, cSt 180
    Viscosity Index 191
    Pour Point, °C -45
    Pour Point, °F -49
    Flash Point, °C 221
    Flash Point, °F 440
    Brookfield Viscosity, Poise 1300@-40°C
    Add to Cart
    R405.00
  • 75W90 GL-5 Gear Oil (Quart 0.946L) (Quart (0.946L) P/N: 57904)
    • Most popular Red Line gear oil, with thousands of applications for passenger cars, light trucks, and racing vehicles
    • Contains additional friction modifiers for suitability with clutch-type limited slip differentials - for most LSDs, no additional friction modifiers are required
    • This product is not designed for use in most manual transmissions or transaxles in passenger vehicles, since the extreme slipperiness may cause synchronizer mesh issues that lead to shifting problems
    • Recommended for API GL-5, GL-6, MT-1, MIL-L-2105E, SAE J2360, and Chrysler spec MS-9763

    About Red Line Gear Oil for Differentials

    • Fully-synthetic formulas created from polyol ester base stocks, offer excellent lubrication under extreme conditions
    • High viscosity-index (VI) to provide relatively constant viscosity and film thickness with varying temperature change
    • Ester base stocks and friction modifiers provide additional slipperiness to lower operating temperatures by reducing the sliding friction in hypoid gears
    • Superior shear stability and reduced oxidation compared to other synthetics and conventional gear oils
    • Exceed API GL-5 specifications
    • Engineered to provide the highest degree of protection and improvement of differential efficiency for better mileage, longer drain intervals, and less wear

    Typical Properties

    API Service Class GL 5+
    Viscosity Grade SAE 75W90
    Vis @ 100°C, cSt 16.4
    Vis @ 40°C, cSt 115
    Viscosity Index 155
    Pour Point, °C -45
    Pour Point, °F -49
    Flash Point, °C 227
    Flash Point, °F 440
    Brookfield Viscosity, Poise 1100 @-40°C
    Add to Cart
    R376.00
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