Best 75w90 Synthetic Gear Oil: image
Best Overall

Limited slip differentials, Red Line Gear Oils are recommended for use in the following applications. The product is formulated with polyolefin base oils and contains no additives or additives to alter its properties. It has a low friction coefficient and can be used without any additional friction modifiers. Notably, this comes amid reports that the gear oil may not perform as well as it should under certain conditions.

Value for Money

Red Line Synthetic Oils, which has been manufacturing motor oils and gear oils since 1979, claims to provide superior performance at lower viscosity. The company’s products are formulated using only the highest quality raw materials available in the world. It is also known for its innovative formulations that help reduce friction and increase fuel efficiency. “We have developed our own proprietary formula,” said an official.

Honorable Mention

Lucas SAE 75W-90 Synthetic Gear Oil is a non-foaming, long-lasting lubricant designed especially for high performance applications where other gear lubricants just aren’t good enough. The oil has a low friction coefficient and can be used in limited slip differentials. It contains no additives or additives to alter the properties of the gear oil. Not only this, but it also reduces wear on bearings due to increased friction. This makes it ideal for use in extreme temperatures.

Best 75w90 Synthetic Gear Oil

Top 7 Best 75w90 Synthetic Gear Oil

1
Why we chose it
  • Affordable solutions
  • Fit type: Vehicle Specific
  • Replaces OEM number: Lucas Oil: 10047
  • Excellent for use in limited-slip differentials
  • Packaging May Vary
Lucas Oil 10047 SAE 75W-90 Synthetic Transmission and Differential Lube - , Clear, 1 Quart (32 Ounces): image
96%
customers recommend this product
4.8/ 5
2
Why we chose it
  • Part number: UFS759GL4
Ultralub Ultra1Plus SAE 75W-90 Synthetic Gear Oil, API GL-4 (6 Pack QT): image
94%
customers recommend this product
4.7/ 5
3

Motul 105777 Gear300 75W90 Synthetic Fluid 1 L

394 ratings | 41 offers | 394 Reviews
Price: $15.94$40.95
Why we chose it
  • No Batteries Required
  • Product Type: Auto Oil
  • Fit Type: Universal Fit
  • Country of Origin : Germany
Motul 105777 Gear300 75W90 Synthetic Fluid 1 L: image
98%
customers recommend this product
4.9/ 5
4
Why we chose it
  • Exceptional wear protection and superior performance at all operating temperatures
  • Uses custom additives to provide the best performance in Visco-Lok & Smart-Lok differentials
  • Allows higher loads, superior shear stability and reduced oxidation
  • 1 QT / 0.946 L
Can-Am ATV Chaincase XPS Synthetic Oil/Lube/Lubricant Gear/Oil Fluid Quart 75w90: image
96%
customers recommend this product
4.8/ 5
5

Red Line 58305 75W90NS GL-5 Gear Oil – 1 Gallon, 1 Pack

55 ratings | 18 offers | 55 Reviews
Price: $62.72$80.95
Why we chose it
  • Quality you can trust
  • Better protection
  • Improved performance
Red Line 58305 75W90NS GL-5 Gear Oil - 1 Gallon, 1 Pack: image
98%
customers recommend this product
4.9/ 5
Mileage4.6
Value for money4.5
6

Red Line 57905 75W90 GL-5 Gear Oil – 1 Gallon

427 ratings | 18 offers | 427 Reviews
Price: $59.53$81.7
Why we chose it
  • Allow for faster shifting
  • Great gear protection and performance
  • Good shiftability and synchro compatibility
  • Use to prevent limited-slip chatter
Red Line 57905 75W90 GL-5 Gear Oil - 1 Gallon: image
98%
customers recommend this product
4.9/ 5
Value for money4.6
Light weight4.6
Mileage4.6
Top Pick
7

Red Line 57904 (75W90) Synthetic Gear Oil – 1 Quart

1,031 ratings | 43 offers | 1,031 Reviews
Price: $16.99$35.68
Why we chose it
  • Contains additional friction modifiers for suitability with clutch-type limited slip differentials – for most LSDs, no additional friction modifiers are required
  • Recommended for API GL-5, GL-6, MT-1, MIL-L-2105E, SAE J2360 and Chrysler spec MS-9763
  • Most popular Red Line gear oil, with thousands of applications for passenger cars, light trucks and racing vehicles
  • 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
Red Line 57904 (75W90) Synthetic Gear Oil - 1 Quart: image
98%
customers recommend this product
4.9/ 5
Top Pick
Red Line 57904 (75W90) Synthetic Gear Oil - 1 Quart
Red Line's 75W90 Synthetic Gear Oil is their most popular gear oil, and is the preferred product in nearly all car and light truck differentials, both conventional and limited-slip. 75W90 is preferred for most racing applications. It contains friction modifier which is recommended for limited-slip units. 75W90 Gear Oil can be used in many transmissions and transaxles. However, other Red Line lubricants have better frictional properties for rapid synchronization. Exceeds API GL-5. Red Line's Synthetic Gear Oil's are designed to provide the highest degree of protection and greatest efficiency for your drivetrain. Red Line provides a complete line of drivetrain lubricants which are optimized for differential, transmission or transaxle use over a wide range of temperatures. Proper selection depends upon the manufacturers' requirements and whether the application is for passenger automotive, commercial or racing use. Red Line Gear Oils contain polyol ester basestocks to provide excellent lubrication even under extreme conditions of high-loading and high-temperatures. Their natural lubricity provide excellent slipperiness which reduces the sliding friction in hypoid gears to reduce wear and temperatures. The synthetic basestocks have a natural multigrade property, so large amounts of unstable thickeners are not required to manufacture our gear oils which means that Red Line Gear Oils will provide a stable viscosity for even extended periods of use. Red Line also manufactures gear oils which can be used in limited-slip differentials without the use of additional friction modifiers.
Ranking the Brands
Lucas Oil: 14.29%
Ultralub: 14.29%
Motul: 14.29%
Can-Am: 14.29%
Red Line: 42.86%

Comparison Table

Сomparison: Lucas Oil 10047 SAE 75W-90 Synthetic Transmission and Differential Lube - , Clear, 1 Quart (32 Ounces): imageСomparison: Ultralub Ultra1Plus SAE 75W-90 Synthetic Gear Oil, API GL-4 (6 Pack QT): imageСomparison: Motul 105777 Gear300 75W90 Synthetic Fluid 1 L: imageСomparison: Can-Am ATV Chaincase XPS Synthetic Oil/Lube/Lubricant Gear/Oil Fluid Quart 75w90: imageСomparison: Red Line 58305 75W90NS GL-5 Gear Oil - 1 Gallon, 1 Pack: imageСomparison: Red Line 57905 75W90 GL-5 Gear Oil - 1 Gallon: imageСomparison: Red Line 57904 (75W90) Synthetic Gear Oil - 1 Quart: image
Lucas Oil 10047 SAE 75W-90 Synthetic Transmission and Differential Lube – , Clear, 1 Quart (32 Ounces)Ultralub Ultra1Plus SAE 75W-90 Synthetic Gear Oil, API GL-4 (6 Pack QT)Motul 105777 Gear300 75W90 Synthetic Fluid 1 LCan-Am ATV Chaincase XPS Synthetic Oil/Lube/Lubricant Gear/Oil Fluid Quart 75w90Red Line 58305 75W90NS GL-5 Gear Oil – 1 Gallon, 1 PackRed Line 57905 75W90 GL-5 Gear Oil – 1 GallonRed Line 57904 (75W90) Synthetic Gear Oil – 1 Quart
BrandLucas OilUltralubMotulCan-AmRed LineRed LineRed Line
Liquid Volume1 Quarts1 Liters32 Fluid Ounces128 Fluid Ounces1 Gallons1 Quarts
Item Weight2.03 pounds1.98 pounds4.5 pounds7 pounds5 pounds1.7 pounds
Viscosity75W-9075W-9075W9075W90
ManufacturerLUCAS OILUltrachem LLCMotulBRPRed LineRed LineRed Line
Product Dimensions9.94 x 3.09 x 2.92 inches1 x 1 x 1 inches12 x 8 x 9 inches11 x 6.8 x 4.5 inches7.5 x 4 x 11.25 inches4 x 3.9 x 8.7 inches
Is Discontinued By ManufacturerNoNoNoNoNoNo

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