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View Full Version : Differential - Tips on Changing Gear lube - Amsoil Synthetic Gear Lube


Amsoil Dealer
01-08-2006, 12:39 AM
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Helpful Differential Recommendations:

- Flush (drain) as much of the old fluid out.
- Differential fluid capacity depends on ring gear and axle housing size.
- Do not over/under fill differential. This could mean a capacity difference of a quart
or more and may cause overheating problems. (See owner’s manual for proper fill level)

FYI --- AMSOIL gear oils are formulated with friction modifiers for limited slip differential applications. There is no need to add limited slip or additional additives. Should limited slip differential chatter occur, add AMSOIL Slip-Lock™ friction modifier additive.

- After changing the differential fluid, drive the vehicle in 7 or 8 figure eight turns, so the new lubricant can work its way into the axle assembly.
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"Synthetics" provide the long-lasting protection, fuel efficiency and dependability needed for top performance, even extreme-pressure conditions, and stays fluid in cold temperatures for easy cold-weather shifting.
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Please Consider: AMSOIL SEVERE GEAR™ Synthetic Extreme Pressure (EP) Lubricant 75W-90. Formulated for the severe operating conditions of today’s pick-up trucks, SUVs, heavy equipment and other hard working vehicles.

Performance

AMSOIL SEVERE GEAR™ provides performance beyond that possible with conventional gear oil. These AMSOIL custom products offer superior gear and bearing protection, better friction and heat reduction, increased efficiency and extended service life.

- Superior Film Strength
- Controls Thermal Runaway
- Rust and Corrosion protection
- Reduced Operating Temperatures
- Improved Efficiency
- Longer Oil, Seal, & Equipment Life
- Temperature Extremes

AMSOIL SEVERE GEAR™ EP lubricants excel in HOT and COLD temperature extremes. By design, they resist breakdown from high heat, preventing acids and carbon/varnish formation. Their waxfree construction also improves cold flow properties, improving fuel economy and cold weather shifting.

Applications

AMSOIL SEVERE GEAR™ Synthetic EP Lubricants are 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.

Glk21c
01-12-2006, 05:10 AM
AMSOIL SEVERE GEAR™ is compatible with most limited slip differentials. If limited slip differential chatter occurs, add AMSOIL Slip-Lock™ friction modifier additive.

Steve, have you heard of any Dodge 3.92 lim slip rears needing the fric. modifier additive when using the SEVERE GEAR 75W-140 lube? I would like to know before I change over my new 06 Dakota.

thanks
GLK21C

Amsoil Dealer
01-12-2006, 06:08 PM
AMSOIL SEVERE GEAR™ is compatible with most limited slip differentials. If limited slip differential chatter occurs, add AMSOIL Slip-Lock™ friction modifier additive.

Steve, have you heard of any Dodge 3.92 lim slip rears needing the fric. modifier additive when using the SEVERE GEAR 75W-140 lube? I would like to know before I change over my new 06 Dakota.
thanks
GLK21C
Hi Artie,

AMSOIL SEVERE GEAR™ is the gear lube I would recommend for your truck. It already has the friction modifier additive included within the formulation. Our other Gear Lubes do not, and require the addition of our AMSOIL Slip-Lock™ friction modifier additive.

The mention of "If limited slip differential chatter occurs, add AMSOIL Slip-Lock™ friction modifier additive.", is a cautionary statement for older differentials that may already be demonstrating troublesome characteristics (chatter).

__________ https://www.amsoil.com/StoreFront/images/svg_350pxh.jpg __________

Performance - AMSOIL SEVERE GEAR® provides performance beyond that possible with conventional gear oil. These AMSOIL custom products offer superior gear and bearing protection, better friction and heat reduction, increased efficiency and extended service life.

Superior Film Strength
Controls Thermal Runaway
Rust and Corrosion protection
Reduced Operating Temperatures
Improved Efficiency
Longer Oil, Seal, & Equipment Life

Product Description

AMSOIL SEVERE GEAR® Synthetic Extreme Pressure (EP) Lubricants are premium grade lubricants specifically engineered for maximum performance in severe duty applications. These state-of-the-art AMSOIL formulations feature an exclusive blend of high viscosity, shear stable synthetic base oils and an extra treatment of high-performance additives. AMSOIL SEVERE GEAR® Synthetic EP Lubricants maintain their 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® lubricants help 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 Lubricants inhibit rapid lubricant degradation and component damage. Equipment runs better and lasts longer with AMSOIL SEVERE GEAR® Synthetic EP Lubricants.

Applications

AMSOIL SEVERE GEAR® Synthetic EP Lubricants are 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 vehicles especially prone to severe service.

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

Use in differentials, manual transmissions or other gear applications where one or more of the following standards are specified: API GL-5 & MT-1, MIL-PRF-2105E, Dana SHAES 234 (Formerly Eaton PS-037) for 250,000 miles, Mack GO-J, Arvin/Meritor 0-76N (75W-90), plus hypoid gear oil specifications from all domestic and foreign manufacturers such as GM, Ford and Daimler Chrysler. Can also be used in axles where API Service GL-4 lubricant is recommended.

Regards,

Steven Roark, AMSOIL DEALER # 1061837