Eaton Fuller 8LL Transmission for Sale | 8-Speed Manual with Low-Low Deep Reduction Split | Vocational / Heavy-Haul Class 8 Manual

Description

Affordable 8LL Transmission for Sale

An 8LL transmission is known for its versatility and strength, ideal for heavy-duty applications such as construction, logging, mining, heavy hauling, and severe-duty vocational work. This 8LL Transmission for Sale at our store offers a wide range of gear options including the critical low-low deep reduction first gear (12.64:1), making it suitable for various challenging driving conditions, from starting heavy loads on steep job-site grades to highway cruising in the High Range overdrive gears.

About the Eaton Fuller 8LL Transmission

The Eaton Fuller 8LL transmission is a robust, heavy-duty manual transmission renowned for its versatility across vocational and heavy-haul Class 8 truck applications. Designed to handle the toughest conditions, these transmissions are an excellent choice for both on-road and severe-duty off-road vehicles. Our 8LL transmissions for sale are carefully selected, inspected, and certified to ensure they meet the highest standards of quality and reliability.

What Makes the 8LL Different: The Low-Low Deep Reduction Split

The defining feature of the 8LL is the low-low deep reduction gear split that adds an ultra-low 12.64:1 first gear. This is significantly deeper than the lowest gear in standard road transmissions like the Eaton RTLO-18918 18-speed (lowest gear 14.66:1 but with much closer ratio spacing for highway use). The 8LL’s deep Low Range allows:

• Loaded dump truck start on 15%+ grade: Critical for construction site operations

• Concrete mixer drum rotation under power while creeping: Allows controlled discharge on grades

• Logging truck pull-out from forest road: Heavy timber loads on poor surfaces

• Mining haul truck operation: Sustained low-speed high-torque applications

• Heavy-haul tractor start with oversize/overweight loads: Specialized hauling

Features of the 8LL Transmission

• Versatility: Designed for heavy-duty vocational and severe-duty trucks, the 8LL offers versatility in handling different conditions, from urban construction sites to rugged off-road and severe-duty terrain.

• Gear Range: Provides a wide range of gears with the deep-reduction Low-Low, allowing precise control and efficient power delivery across both starting and cruising conditions.

• Durability: Built on the proven Eaton Fuller twin-countershaft architecture, the 8LL transmission is known for its durability and reliability in demanding applications like construction, logging, and heavy hauling.

• Shift Patterns: Employs a double H-shift pattern (sometimes called the “low-low shift pattern” or “8LL pattern”) that allows easy shifting between Low Range deep-reduction gears and High Range road gears via the air-actuated range selector.

• Power Handling: Capable of handling high torque and horsepower outputs (1,400 to 2,050 lb-ft), making it suitable for the heaviest commercial loads and severe-duty applications.

• Efficiency: Designed to maximize mechanical efficiency through direct manual power delivery while supporting the deep-reduction starting needed for heavy loads.

• Compatibility: Available in various configurations to suit different truck models and engine setups, ensuring compatibility with vocational and heavy-haul applications across major Class 8 manufacturers.

• Maintenance: Designed for ease of maintenance with accessible components and service points to minimize downtime in vocational and fleet applications.

8LL Transmission Fits

Vehicles by Application Category:

• Construction: Mack Granite, Peterbilt 567, Kenworth T880

• Logging and Forestry: Western Star 4900, Freightliner 122SD, Volvo VHD

• Mining: Caterpillar 770G Off-Highway Truck, Komatsu 830E Electric Drive Mining Truck, Terex MT4400AC Mining Truck

• Heavy Hauling: Kenworth W990, Peterbilt 389, Volvo VNL (heavy-haul applications)

• Off-Road Applications: Oshkosh Defense HEMTT (Heavy Expanded Mobility Tactical Truck), BAE Systems RG33 MRAP (Mine-Resistant Ambush Protected vehicle), Navistar MaxxPro MRAP

• Long-Haul Transportation: Freightliner Cascadia (vocational variants), Volvo VNL (vocational), International LT Series

Compatible Engines:

• Cummins Engines: Cummins ISX15, Cummins ISM, Cummins L9

• Caterpillar Engines: Caterpillar C13, Caterpillar C15, Caterpillar 3406 (older)

• Detroit Diesel Engines: Detroit Diesel Series 60 (older), Detroit Diesel DD13, Detroit Diesel DD15

• PACCAR Engines: PACCAR MX-13, PACCAR MX-11

• International Engines: International A26, International N13

• Volvo Engines: Volvo D13, Volvo D11

• Mack Engines: Mack MP8, Mack MP7

Condition of Products

Our 8LL transmissions for sale are all used, but they undergo rigorous inspection and certification processes. We ensure that every transmission is in excellent working condition, with good gears, verified Low-Low deep reduction function, and verified High Range road gear operation.