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LE’s versatile transmission fluids keep fleets running

The purpose of a transmission fluid is to cool and lubricate, ensuring smooth performance of your vehicle. The quality of your transmission fluid is especially important in extreme driving conditions such as heavy loads, steep terrain, continuous operation and lots of starts and stops.

Known worldwide for its heavy-duty, high-performance transmission fluids, LE works with small and large customers operating fleets of on- and off-road vehicles and mobile equipment. These customers depend on LE’s transmission fluids to protect their valuable mobile assets. Together, LE transmission fluids and engine oils together will help any size operation keep its fleet running and avoid costly downtime and repairs.

Protection from friction is key to drivetrain performance

Whether on the field, on the road or at the site, a vehicle’s drivetrain must withstand heat and friction to avoid premature wear and failure. Tractors, buses, dozers, cars and trucks all benefit from the protection of LE’s high-performance transmission fluids. LE’s advanced formulations keep moving parts cool. Our transmission fluids are resistant to oxidation. They prevent thickening and the formation of sludge and varnish deposits. LE’s transmission fluids resist condensation and acid formation, while ensuring efficient operation in cold temperatures. If maximizing the operation of your on- and off-road vehicles is a priority, choose LE transmission fluids.

Synolec® Transmission Fluid (LE640)

Typical Applications: Heavy-duty manual transmissions where extended service intervals and warranties are required; on-highway light- and heavy-duty trucks, buses and vans; off-highway equipment, including those used in construction, mining and agriculture.

Available SAE Grade: 40 (640)


Synolec Transmission Fluid is a premium full-synthetic lubricant designed for fuel efficiency and extended drain intervals while meeting OEM warranty requirements. It is intended for use in manual transmissions that require a non-EP transmission fluid for light- to severe-duty, on- and off-highway equipment operating in a diverse range of environments. Formulated to protect higher torque transmissions coupled with increased horsepower engines, it will prolong transmission life by reducing gear wear and copper corrosion. Synolec Transmission Fluid meets or exceeds the specifications of several manual transmission OEMs, including Eaton transmissions such as Roadranger, Ultrashift Plus, Fuller Advantage, FR and RT Series.

Dexron® Automatic Transmission Fluid (LE1136)

It meets the performance requirements of Dexron®, Dexron® III, and Dexron® VI, and is suitable for use in a variety of GM® passenger cars and light duty trucks.


Dexron VI Automatic Transmission Fluid is a high-performance, synthetic-based automatic transmission fluid (ATF) for use in automobiles with automatic and power shift transmissions, in power steering systems, and in hydraulic pumps. GM’s Dexron VI classification was introduced for 2005 model year and newer GM vehicles. This fluid is also backward compatible and recommended for use in transmissions recommending the use of previous Dexron fluids. It is formulated to provide smooth shifting, low shudder, and long-life performance in automatic transmissions.

Automatic Transmission Fluid (ATF)

Monolec® Syn Multi-Vehicle Automatic Transmission Fluid (LE1150)

Typical Applications: Suitable for use in a variety of passenger cars, light-duty trucks, and light- to severe-duty highway vehicle automatic transmissions, including those used in GM®, Ford®, Chrysler®, Honda®, Toyota® and many other vehicles. See product details for complete list and specifications.


Monolec Syn Multi-Vehicle ATF is a versatile high-performance automatic transmission fluid suitable for regular- to severe-duty use in a variety of automatic transmissions in passenger cars and trucks. This full synthetic formulation has an uptreated additive package that includes Monolec, LE’s proprietary wear-reducing additive. Monolec Syn Multi-Vehicle ATF ensures smooth shifting, reduced wear on parts, longer fluid life and a significant decrease in maintenance costs.

Transmission, Drive Train, Differential Fluid

Monolec® Power Fluid (LE7500)

Typical Applications: Heavy-duty transmission systems, combination transmission-hydraulic (wet brake) systems, hydraulic systems, power steering and power takeoff, sump systems that require tractor hydraulic fluid

Competitor           LE7500

Even in severe field conditions, Monolec Power Fluid ensures constant, long-lasting performance for most heavy-duty transmissions, combination transmission-hydraulic (wet brake) systems, and hydraulic systems. Its unique blend provides the proven protection of the most advanced wear, friction and oxidation inhibitors, all in one complete formula that you can count on to deliver superior wear performance, consistent friction characteristics, exceptional oxidation stability and excellent foam prevention.

Monolec Power Fluid meets the requirements of a wide variety of manufacturers for systems used in construction, farming, manufacturing, material handling, mining, quarrying and trucking. Its versatility allows inventory consolidation, with just one lubricant for all of your transmission, axle and hydraulic protection needs.

Monolec® Drive Train Fluid (LE7511-LE7551)

Typical Applications: Heavy-duty transmissions; combination transmission-hydraulic (wet brake systems); hydraulic systems; power steering and power takeoff; sump systems that require tractor hydraulic fluid


Monolec Drive Train Fluid is a high-performance, heavy-duty drive train fluid that protects off-road equipment and keeps it in working order, whether it is running intermittently or continuously. It works with today’s newer transmission designs and can be used in final drives, wet brakes and various torque convertors. It improves power throughput density, helping reduce mechanical shudder and eliminate brake chatter and clutch wear. Ideal for use in construction, mining, quarries, hydraulic fracturing and other applications where downtime can be costly, this versatile fluid meets or exceeds the performance requirements of Caterpillar, Allison and Komatsu.

This is not an engine oil formulated to be a drive train fluid; Monolec Drive Train Fluid was specifically developed to meet the rigorous demands of the application. Its carefully selected additive system – which includes Monolec®, LE’s exclusive wear-reducing additive – balances the need for lubricity along with the frictional properties needed to optimize the operation of powershift clutches and wet brakes. The fluid’s high-viscosity base oil helps it stay cool during operation – even in extreme temperatures – with no need for seasonal changeouts.

Available SAE Grades: 10 (7511), 30 (7531), 50 (7551)

Monolec® Syn Gear Oil (LE9919-LE9923)

Typical Applications: Differentials & transmissions in over-the-road fleets, heavy-duty rolling stock, stop-and-go vehicles and off-highway equipment; industrial gearboxes and worm drives that call for SAE 75W-90 or 75W-140 gear oil, and are subjected to low and high temperatures, such as freezer units and paper drums


Monolec Syn Gear Oil is formulated with 100 percent synthetic base fluid and a synergistic additive package, making it the ideal choice for heavy-duty rolling stock transmissions and differentials in severe service conditions. It is also recommended for some high- and low-temperature industrial gearbox applications. Monolec Syn Gear Oil’s robust formula will not break down in severe service. It provides high-temperature oxidation resistance, low volatility and excellent thermal stability, allowing it to provide long-lasting protection for the application. It also retains its flow during subzero temperature conditions. The additive package includes wear-reducing, extreme pressure (EP) and anti-foaming additives.

Available SAE Grades: 75W-90 (9919), 75W-140 (9923)

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