SEVERE GEAR® 80W-90 Differential Lube

Superior Replacement for Conventional Gear Oils

SAE 80W-90 Synthetic Differential Gear Lube

The Severe Gear line is a top selling product here in Sioux Falls! If there is any friction area where an oil can make more gains it’s in the differential. If there is one automotive grade lubricant that is most standardized and not a lot of advances and choices at your parts stores – it’s differential oil!! AMSOIL put Differential lubricants at the top of the list to focus on improvement.

A multi-functional lubricant designed to surpass the requirements of equipment and automotive applications calling for an SAE 80W-90 viscosity grade. Formulated with wax-free synthetic base oils and high-quality additives, AMSOIL 80W-90 Synthetic Gear Lube resists thermal breakdown. Its naturally high viscosity index and shear-stable construction improve film strength and viscosity retention. Provides outstanding protection for gears and bearings, resists heat and helps extend equipment life.

APPLICATIONS

AMSOIL SEVERE GEAR® Synthetic Extreme Pressure (EP) Gear Lube is a premium-grade gear oil specifically engineered for maximum performance in severe-duty applications. This state-of-the-art AMSOIL formulation features an exclusive blend of high-viscosity, shear-stable synthetic base oils and an extra treatment of high-performance additives. AMSOIL SEVERE GEAR® Synthetic EP Gear Lube maintains its viscosity for long-lasting protection against metal-to-metal contact. The proprietary AMSOIL additives form an iron-sulfide barrier coating on gear surfaces, providing the ultimate line of defense against wear, pitting and scoring. AMSOIL SEVERE GEAR® helps prevent “thermal runaway” — a phenomenon caused by a lubricant’s inability to control friction and increased heat under high-stress conditions. By controlling thermal runaway, AMSOIL SEVERE GEAR® Synthetic EP Gear Lube inhibits rapid lubricant degradation and component damage. Equipment runs better and lasts longer with AMSOIL SEVERE GEAR® Synthetic EP Gear Lube.

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Synthetic GL5 80W-90 Performance

AMSOIL SEVERE GEAR® provides performance beyond that possible with conventional gear oil. This AMSOIL custom product offers superior gear and bearing protection, better friction and heat reduction, increased efficiency and extended service life.

Built In Protection in Temperature Extremes

AMSOIL SEVERE GEAR® EP Gear Lube excels in hot and cold temperature extremes. By design, it resists breakdown from high heat, preventing acids and carbon/varnish formation. Its wax-free construction also improves cold-flow properties, improving fuel economy and cold-weather shifting.

Ultimate Cold-Weather Protection

Some gear lubes fail to meet basic low-temperature requirements. Mobil 1 75W-140 Gear Oil, for example, failed to meet the requirements of the industry standards, AMSOIL SEVERE GEAR®, on the other hand, delivers 20% more cold-temperature protection than the standard requires. It delivers better cold-temperature protection than Mobil 1 and Valvoline SynPower.

Applications

AMSOIL SEVERE GEAR® Synthetic EP Gear Lube is excellent for severe applications, such as towing, hauling, steep-hill driving, commercial use, plowing, racing, off-road use, rapid acceleration, frequent stop-and-go operation and high ambient temperatures. Higher horsepower, towing and hauling capabilities of modern vehicles make turbo-diesel pick-ups, SUVs, vans and delivery/utility vehicles especially prone to severe service. Other severe-duty vehicles include light, medium and heavy-duty trucks, buses, heavy equipment, 4X4s, tow trucks, race cars, tractors and motor homes.

Performance Features

• Advanced protection against wear, even with up to 15 percent water contamination¹
• Controls Thermal Runaway
• Protects against rust and corrosion
• Helps reduce operating temperatures
• Maximum efficiency
• Flexible easy-pack for clean, fast installation

For product service life in differentials, consult your owner’s manual or the Original Equipment Manufacturer (OEM) to establish the application, NORMAL or SEVERE.

¹ Based upon AMSOIL testing of AMSOIL Synthetic SEVERE GEAR® 75W-90 and Long-Life 75W-90 Synthetic Gear Lube in ASTM 3233 and ASTM D892.

² Based upon results of samples of Mobil 1 75W-140 and Valvoline SynPower 75W-140 purchased in 2018 and tested in ASTM D2983 by an independent testing facility in May 2018. Samples sent blind to eliminate bias.

* All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are developed by AMSOIL for use in the applications shown.

.	Normal Service	Severe Service
Cars, SUVs, Light Trucks	Drain at 100,000 miles of service or according to the owner’s manual, whichever is longer	Drain at 50,000 miles of service or according to the owner’s manual, whichever is longer
Heavy-Duty Class 8 Line Haul	Follow the OEM drain interval (miles or hours) for synthetic oil up to 250,000 miles or three years, whichever comes first.
Vocational/Delivery	Follow the OEM drain interval (miles or hours) for synthetic oil up to 120,000 miles or three years, whichever comes first.
Heavy Duty Off-Road	Follow the OEM drain interval (miles or hours) for synthetic oil up to 100,000 miles or two years, whichever comes first.

For product service life in differentials, consult your owner’s manual or the Original Equipment Manufacturer (OEM) to establish the application, NORMAL or SEVERE.

MAXIMUM WEAR PROTECTION

• Specifically engineered for maximum performance in severe-duty applications.
• Maintains viscosity for long-lasting protection against metal-to-metal contact.
• Proprietary AMSOIL additives form an iron-sulfide barrier coating on gear surfaces, providing the ultimate line of defense against wear, pitting and scoring.
• Helps prevent “thermal runaway,” a phenomenon caused by a lubricant’s inability to control friction and increased heat under high-stress conditions.
• Inhibits rapid lubricant degradation and component damage, helping equipment run better and last longer.

For product service life in non-differential applications, consult owner’s manual or the OEM for either normal or severe synthetic oil service intervals. Where service intervals are unavailable, drain at twice the interval for conventional oil. Gear oils should be changed more frequently when operating vehicles or equipment in dusty or dirty conditions, unless the gear system is properly sealed and equipped with membrane-type breathers.

Note: AMSOIL does not support extended drain intervals where water contamination occurs. Check and service the gear oil frequently when water contamination is possible.

Recommended for use in differentials, manual transmissions and other gear applications requiring any of the following specifications: API GL-5, MT-1, MIL-PRF-2105E, Dana SHAES 234 (Formerly Eaton PS-037), Mack GO-J, or other GL-5 based specifications from vehicle manufacturers, including Ford*, GM* and Chrysler*. Can also be used in axles where an API GL-4 lubricant is recommended.

This is the SPECIAL TRANS-AXLE formulation which can be used in GL4 specifications.

AMSOIL SEVERE GEAR® (80W-90) provides superior performance and replaces competitors’ 80W-90 gear oils. It is formulated to exceed the requirements of front and rear differentials, transfer cases, transaxles, manual transmissions, oil-lubricated wheel bearings and steering gear boxes.

AMSOIL SEVERE GEAR® is compatible with conventional and synthetic gear oils. Mixing AMSOIL gear oil with other oils, however, will shorten the oil life expectancy and reduce the performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed.

Aftermarket oil additives, other than those specified by AMSOIL, are not recommended for use with AMSOIL gear oil.

AMSOIL SEVERE GEAR® is compatible with most limited-slip differentials. For applications that require additional limited-slip friction modifier, add AMSOIL Slip Lock®.

80W-90 Differential Lube Reviews

Great, as usual

By  JUSTIN D,  a  Verified Buyer  from  Hinesburg, VT  on  August 12, 2021;

I purchased this to put in my brush hog gear case. What a difference! The stock oil would vent out, and the gear case would be hot to the touch after using for an hour or so. Once I put the Amsoil severe gear in, I brush hogged for 8 hours, and you could hold your hand on the gear case. That is amazing!

 

 

Excellent Gear Lube For Rear Limited Slip Differential

By  Rob,  a  Verified Buyer  from  Pueblo, CO, United States  on  June 29, 2021;

The AMSOIL SEVERE GEAR® 80W-90 was the perfect synthetic product for my 2002 Tundra’s rear limited slip differential. I did some heavy towing on a 1,600 mile trip with no problems.

Noticeable difference in an old SM465

By  CatRacer,  a  Verified Buyer  from  Blackfoot Idaho  on  July 21, 2022 ;

I run amsoil fluids in all my rigs, but recently swapped out the old trans fluid in my 89 Suburban. The shifter feel is noticeably less notchy and much smoother.

AMSOIL PRODUCT WARRANTY
AMSOIL products are backed by a Limited Liability Warranty. For complete information visit www.amsoil.com/warranty.aspx.

Buy in the Sioux Falls AMSOIL store at Exit 73 near Tea, SD. or use this Online link to the Amsoil sale page if you are outside of the area.

HEALTH AND SAFETY

This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Safety Data Sheet (SDS). USA and Canada SDS are available upon request at 715-392-7101 or on the AMSOIL Website. Keep Out of Reach of Children. Don’t pollute. Return used oil to collection centers.