SEVERE GEAR®: THE RIGHT TOOL FOR THE JOB

Your vehicle’s differential is likely not top of mind while hauling snowmobiles or ATVs for a fun weekend on the trails. Unfortunately, towing is in the severe service category and places extreme stress on your drivetrain. Today’s vehicles produce substantially more horsepower, torque and towing capacity than their predecessors, yet the design of differential gears and bearings remains largely unchanged. Many differentials even use less gear lube and lower viscosities than before in an effort to reduce drag and increase fuel economy. In essence, less gear lube is responsible for providing more protection.

Fighting the Grind

Differential designs have inherent weaknesses. In a traditional automotive differential, the pinion gear concentrates intense pressure on the ring gear. As the gear teeth mesh, they slide against one another, separated only by a thin layer of lubricant. The repeated stress the lubricant film bears can shear gear lubes, causing permanent viscosity loss. Once sheared, the fluid film weakens, ruptures and allows metal-to-metal contact, eventually leading to gear and bearing failure. The situation is amplified by severe-service applications like towing.

Thermal Runaway

The extreme pressures and temperatures placed on gear lubricants can lead to a serious issue called thermal runaway. As temperatures in the differential climb, some gear lubes lose viscosity and load-carrying capacity. When extreme loads break the lubricant film, metal-to-metal contact occurs, increasing friction and heat. This increased friction and heat, in turn, results in further viscosity loss, which further increases friction and heat. As heat continues to spiral upward, viscosity continues to spiral downward. Thermal runaway is a vicious cycle that leads to irreparable equipment damage from extreme wear, and ultimately catastrophic gear and bearing failure.

AMSOIL SEVERE GEAR Synthetic Gear Lube

SEVERE GEAR excels in protecting gears and bearings from the rigors of severe-service operation. 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 performance.

• Superior film strength

• Controls thermal runaway

• Protects against rust and corrosion

• Helps reduce operating temperatures

• Maximum efficiency

• Long oil, seal and equipment life

• Flexible easy-pack for clean, fast installation

Rust Protection and diesel oils compared.

Confused About Diesel Oil? We’ll help you Joel Youngman|Jan 31, 2020 8:03 AM Your diesel truck is a serious investment – don’t skimp on protection. AMSOIL manufactures the best diesel oils on the market, providing the ultimate protection for your hard-working diesel engine, preserving the horsepower you crave and keeping you on the road. We […]

Mazda race engine

Championship Engine Builder Trusts Only AMSOIL John Baker|Dec 18, 2019 8:11 AM More than 1,080 miles covering six states separate Jesse Prather Motorsports, in Topeka, Kansas, from Virginia International Raceway. And yet Jesse Prather’s influence at the track in October for the Sports Car Club of America’s (SCCA) annual “Runoffs” was unmistakable as an estimated […]

Preventing Diesel Fuel Gelling Note: These off season products your will save more money buying now. But these exclusive prices are by telephone only. Check the online price for a case of the cold flow or all in one then call us at 800-579-0580. Mark Nyholm|Oct 29, 2019 10:12 AM We diesel burners get a […]

fuel stabilizer

How to Store your Snowblower properly. Prevent damage during summer season. John Baker|Apr 06, 2020 2:12 PM Storing a snowblower properly is vital to ensuring it fires up when the snow eventually returns. When the first storm of the season dumps eight inches of snow on your driveway, you don’t want to be messing around […]

top dead center valve timing

Why Does My Engine Knock? 3 Possible Explanations. John Baker|Aug 06, 2019 10:56 AM There are a few different reasons your engine might make a knocking, ticking or pinging sound. Let’s break each down and talk about what might be happening. Is it an engine knocking sound, tick or ping? One driver’s knock is another driver’s tick. Or ping. […]