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AMSOIL Automatic Transmission and Gear Synthetic Lubes

Why do Transmissions fail? Why is most energy lost due to the fluid in the differential?

Good questions and all can be addressed based on the quality of the fluids used. Cold weather performance, Oxidation resistance, sheer resistance, load carrying capacity and anti-wear properties are constantly addressed by AMSOIL's research team. Be amazed by improved drivetrain performance in all types of vehicles!

Drivetrain Product Selection Menu

Manual transmission & Transaxle Gear Lube
SAE 75W-90

Synchromesh Manual Transmission Fluid SAE 5W30 (MTF)
Severe Gear EP Lubricant
GL5 (3-Viscosities)
75-W90 (SVG)
75W-110 (SVT)
75W-140 (SVO)
Synthetic Automatic Transmission Fluid Universal
A Top Seller
OTR Trucking
SAE 50 Long Life Transmission Oil
Synthetic Low-Viscosity Automatic Transmission Fluid
Dextron VI
Mercon SP
Toyota WS and more.
Long Life Gear Lubes
Differential Fluid

75W90 (FGR)
75W140 (FGO)
Best Value for OTR
Tractor Transmission & Hydraulic Fluid (ATH)
Synthetic Gear Lube
Outstanding lower cost GL-5 Hypoid Gear Oil
AMSOIL-Allison Torque-Drive Automatic Transmission Fluid (ATD)
Supershift Racing Fluid
Type-F (ART)
Synthetic Chaincase Oil
Sleds and ATVs (TCC)

Universal Marine Gear Lube
For GL4 & GL5

Powershift Transmission Fluid
Severe Gear SAE-190 Severe Gear SAE-250


Every day we receive calls from our customers regarding how AMSOIL improved shifting, longer fluid life, amazing impressions among peers and even extending the life of tired and problematic auto transmissions. Amsoil's drivetrain products are indeed amazing as you will soon see for yourself!

2008 - Amsoil Technical Service Paper on "gearbox Thermal Runaway"

"AMSOIL Automatic Transmission Fluid will reduce the transmission failure rate in fleet applications generally by 80%." (100% per recent Lubes & Greases article regarding the Portland Longshoreman fleet.)

AMSOIL's drive train synthetic products significantly lower temperatures, generally last three to ten times longer, cost less, allow for better energy transfer (automatic transmission fluids), and reduce wear under load.
Unlike 95% of the other brands, AMSOIL contains the very best seal conditioner and for limited slip applications our Severe Gear line contain all the additive needed. (Slip-lock additive is available separately for customers who wish to add to their in house gear lubricants for a fraction of the cost of OEMs.)

For Marine applications Rust protection is not inherent w/ lubrication! Anti-Corrosion additives actually work against wear protection and AMSOIL is the first to solve this problem to this degree. 

Please refer to product data sheets beneath each listing.
Gear Lube Product Online Pricing
Transmission Fluid Online Pricing
Use this link to get set up as a preferred customer & save 30% or
just call 1-800-579-0580 for automatic savings/best price.


Severe Gear Synthetic EP Lubricant

 75W-90 / 110 / 75W-140

Gear Lube Technical Service Bulletin - Operating Conditions

Bulletin: Why you need to change out the OEM differential oil ASAP

Whitepaper Gear Lube Study - San Antonio Lab researches Gear Lubes. See how your brand stacks up.

AMSOIL Severe Gear Synthetic Extreme Pressure (EP) Lubricants are premium grade lubricantsGive your car or truck a break from the stress with Severe Gear. 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. Instant performance in freezing temperatures. The proprietary AMSOIL additives form an iron-sulfide barrier coating on gear surfaces, providing the ultimate line of defense against wear, pitting and scoring. Normally, this product has a 100,000 mile interval. AMSOIL Severe Gear lubricants prevent "thermal runaway" - a phenomenon caused by a lubricant's inability to control friction and increased heat under high-stress conditions. By preventing 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. Product Codes:

New page for Severe Gear 75W90 Hypoid Gear Lube

Purchase AMSOIL Severe Gear

NEED a GL-4? Please examine the AMSOIL Synchromesh Transmission Fluid (MTF) or the 75W90 Manual Transmission Gear Lube (MTG)

In order to ensure continued viscosity protection in high-shear conditions, it is required that SAE 75W-140 automotive gear lubes stay in grade throughout
the CEC L-45-A-99 (KRL) 20-Hour Shear Test. AMSOIL recently subjected
Severe Gear 75W-140 Synthetic Gear Lube (SVO) and four competing 75W-140 gear lubes to KRL shear stability testing. SAE J306 standards dictate SAE 140 gear lubes maintain a minimum 24.0 cSt viscosity. Although each of the test oils met this standard before testing began, each competitor failed to stay in grade following the test. In fact, two experienced viscosity losses so dramatic that they dropped well below SAE 140 requirements and all the way down to an SAE 85 viscosity. AMSOIL Severe Gear, on the other hand, easily retained its viscosity within SAE J306 requirements, indicating its superior ability to protect against thermal runaway by maintaining its protection qualities in severe, high shear operating conditions.

Gear lubes which fail testing, Redline, Royal Purple, Lucas, Torco.

See thw Gear Oil test study for expanded reference.

AMSOIL Long Life Synthetic

75W-90 & 75W140 Gear Lub
Specifically Engineered for 500,000-Mile Service Life in Over-The-Road Trucks.

 Texas customer testimonial using this product in a Mazda 6: I'm only buying a years worth this time for economic reasons. Also, the Amsoil gear lube works way better in cold weather than the factory fill. The factory stuff was so poor, that I had to double-clutch on upshifts to keep from grinding until the box warmed up.


    A 500,000 mile gear lube. AMSOIL holds it's viscosityAMSOIL Long Life Synthetic Gear Lubes are extended drain gear lubes engineered specifically to last several times longer and protect gears better than all conventional gear oils. These exclusive AMSOIL formulations of premium synthetic base oils and high performance additives resist acid, carbon and varnish formation from oxidative breakdown. Components run cleaner and last longer. AMSOIL Long Life Synthetic Gear Lubes are shear stable and friction reducing. They maintain their viscosity during extended service for maximum wear control and they are fuel-efficient. The superior cold temperature fluidity and high temperature stability properties of AMSOIL Long Life Synthetic Gear Lubes make them excellent for all-season use. Equipment lasts longer and maintenance costs are reduced with AMSOIL Long Life Synthetic Gear Lubes. Product Codes:

  • FGR (75W-90) / Data Sheet
  • FGO (75W-140) / Data Sheet
  • NEW: Gear Lube Technical Service Bulletin - Operating Conditions

Purchase Long Live FGR & FGO Gear Lube


AMSOIL Synthetic Gear Lubes

SAE 80W-90 (AGL)

Our local Land Rover dealership now requires AMSOIL Gear Lubes!


AMSOIL AGL - Ideal for winter and fleet performance.AMSOIL 80W-90 Synthetic Gear Lube is a multi-functional product 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 improves film strength and viscosity retention. AMSOIL Synthetic 80W-90 Gear Lube prevents wear, resists heat, and protects gears. It lasts longer in service than conventional gear oils and increases equipment life.

AMSOIL Synthetic 80W-90 Gear Lube provides:
  • High Load Gear and Bearing Protection
  • Longer Oil and Equipment Life
  • Lower Maintenance Costs
  • Compatibility With Conventional and Synthetic Gear Lubes
  • Multi-functional for Multiple Applications

Product Code: AGL

AMSOIL Synthetic 80W-90 Synthetic Gear Lube is recommended for use under various combinations of high-speed, shock loads, low speeds and high torque conditions. It is recommended for use in all light and heavy-duty, automotive, commercial or industrial applications requiring SAE 80W-90 EP gear lube. AMSOIL Synthetic 80W-90 Gear Lube replaces all conventional 80W-90 gear oils and exceeds the lubrication and performance requirements of front and rear differentials, transfer cases, transaxles, manual transmissions, oil lubricated wheel bearings, and steering gear boxes that require any of the following specifications:

  • API GL-5, MT-1
  • MIL-PRF-2105E
  • Dana SHAES 234 (Formerly Eaton PS-037) for 250,000 miles
  • Mack GO-J, Arvin/Meritor O-76D
  • Hypoid gear oil specifications from all foreign or domestic manufacturers such as GM, Ford, and Daimler Chrysler.
  • Can also be used in rear axles where API Service GL-4 lubricant is recommended.

Product Codes:

Purchase AMSOIL AGL Synthetic Gear Lube in our new store

For the NEW AMSOIL MTG GL-4 and MTF 5W30 manual transmission fluid please see our expanded listings on these two new products.


AMSOIL 100% Synthetic Automatic Transmission Fluid

AMSOIL Universal Automatic Transmission Fluid is now one of our top selling items. A real problem solver. Results you can see. Especially in the wallet. Transfers power several times more efficient than petroleum synthetic transmission fluids. Many of my customers report a decrease in RPM at the same speed under load not to mention excellent wintertime performance.
Expanded Product Information. Please See.

Reduces excessive transmission temperatures by 20* to 50*F and increases transmission life. Improves fuel efficiency, reduces transmission temperatures and increases transmission life. Provides unsurpassed thermal stability and up to five times the service life of conventional ATF's. Delivers maximum protection for towing and other severe-duty applications. 

Please read all our technical and seasonal information on this great product. The AMSOIL ATF is our most popular product outside of the engine oils and has gained us some of the largest accounts due to its ability to reduce failures and extend transmission life.

AMSOIL Synthetic Low-Viscosity Automatic Transmission fluid (ATL)

New from Amsoil. Meets Toyota WS (World Standard)AMSOIL Synthetic Low-Viscosity Automatic Transmission Fluid is recommended for automatic transmissions and other applications requiring DEXRON® VI, MERCON® LV, SP or Toyota WS (World Standard).

More detail and ordering AMSOIL Low Viscosity ATF

Fuel Efficient Synthetic Automatic Transmission Fluid - EXTENDED FLUID SERVICE LIFE
Most drivers are unaware that transmissions commonly operate under severe service and require shorter fluid drain intervals. AMSOIL Synthetic Low-Viscosity Automatic Transmission Fluid is a long-life fluid capable of extended service intervals. It provides an extra margin of protection, especially when fluid change intervals are missed or during heavy use; even during abuse. Drivers can count on AMSOIL Low-Viscosity ATF to provide protection beyond conventional fluids.



Universal Synthetic Marine Gear Lube
SAE 75W/80W-90 (AGM)

Amsoil AGM is the only marine gear lube to resist up to 10% solution of water in the gearbox.SAE 75W/80W-90 Universal Synthetic Marine Gear Lube (AGM)
High Performance lubricant engineered to meet the demands of marine applications. AMSOIL Universal Synthetic Marine Gear Lube provides:

  • Excellent Gear and Bearing Protection even when contaminated with 10% water
  • Reduced Friction and Wear
  • Rust and Corrosion Protection
  • Long Seal Life
  • Superior Foam Prevention

AMSOIL Universal Synthetic Marine Gear Lube is an exclusive AMSOIL formulation of synthetic base oils and high performance additives that address the specific concerns of marine applications. It is extreme pressure (EP) additive fortified for superior protection of fast accelerating, high torque/horsepower engines. It protects against shock loading from cavitation of heavily loaded engines.

AMSOIL Universal Synthetic Marine Gear Lube is water resistant. It maintains extreme pressure protection even when contaminated with as much as 10% water. It promotes longer seal life, preventing excessive water leakage. AMSOIL Universal Synthetic Marine Gear Lube protects against rust and is compatible with aluminum, copper and brass alloys.

Product Code:


*NEW* AMSOIL Torque-Drive™ Synthetic Automatic Transmission Fluid (ATD)

Recommended for use in applications specifying
Allison® TES 295 or C-4, Dexron® III, Mercon®, TE-ML 14C
  *Call for price!

Visit our expanded section for this product.



AMSOIL Synthetic Tractor Hydraulic Transmission is highly regarded in several industry publications.

AMSOIL Synthetic Tractor Hydraulic/Transmission Oil
   Hydraulic tractor oil                     ISO 46, SAE 5W30

  "Power Enhancing - Temperature Control - AMSOIL ATH solves problems!"

See our new section for this popular product! One of AMSOIL's first to put on the market in the early 70's.

AMSOIL Synthetic Tractor Hydraulic/Transmission Oil is an "all weather" Universal Tractor Transmission Oil (UTTO) engineered to meet the tough demands of heavy-duty, hydraulic-powered farm and commercial equipment. Its unique formulation of synthetic base stocks and additives effectively reduces wear, resists heat, protects against rust and extends fluid and equipment service life.


AMSOIL Supershift Racing Transmission Fluid

Synthetic Supershift Racing Transmission Fluid, 10W
Delivers outstanding performance in high performance, high horsepower vehicles. Formulated without friction modifiers and viscosity improvers for positive clutch pack engagement and stable viscosity. Prevents slippage and lowers heat compared to conventional transmission fluids. Superb high temperature resistance prevents oxidation and varnish. Prevents wear, lasts longer and improves transmission life. Recommended for racing and street performance automatic transmissions. Performance specifications include: Allison C-4, Ford Type F

*Saves up to 2-MPG when mixed with AMSOIL ATF on rear wheel drive vehicles (do not use in front wheel drive vehicles - call for more detail)

Package sizes include:

1-Quart Bottle
1-Quart Bottles (case of 12)

Purchase Amsoil Super Shift (ART) in our new online store

AMSOIL Synthetic Supershift Racing Transmission Fluid is specifically formulated for automatic transmissions operating in high horsepower and high torque conditions. AMSOIL Supershift Transmission Fluid contains top-quality additives selected specifically for racing applications. Its unmatched transmission friction performance provides high holding capacity for maximum torque transfer and brake power, reduced wear and longer clutch plate life. Supershift virtually eliminates slippage, promotes positive clutch engagement and improves overall shift performance, helping racers improve on elapsed times.

Product Code ART / Please Product Data Sheet



Powershift Transmission Fluid

Synthetic Powershift Transmission Fluid SAE 10W Specifically formulated for heavy-duty powershift transmissions. Provides outstanding friction performance for enhanced clutch engagement. Prevents slippage and glazing. Shear stable and antiwear fortified. Protects gears and bearings. Resists high temperature oxidation, varnish and sludge formation. Superb cold flow properties. Extended drain interval capable. Recommended for heavy-duty service found in commercial and earth moving applications as well as lighter duty transmissions requiring the listed specifications. Performance specifications include: TO-4, C-4, ZF TE-ML 03A, Komatsu TO-10, API GL-1

AMSOIL Synthetic Powershift Transmission Fluids are Recommended for Applications Requiring the Following Specifications:

  • Caterpillar TO-4
  • Allison C-4
  • HD Torque and Drivetrain

Call 1-800-579-0580 for current pricing

Package sizes include:

5-Gallon Pail
55-Gallon Drum

Product code CTG (10W); CTJ (SAE 30); CTW (SAE 50)

Please examine product data sheet for more detail

Series 2000 Chaincase Lubricant

Amsoil Chaincase Lube for sleds and ATVSee main information, ordering and cross reference page

Product Code TCC



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