Meritor MD2014X-390

The Meritor MD2014X-390 is a robust tandem rear-drive axle differential, engineered to deliver reliable, high-torque performance for Class 8 commercial trucks. With a 3.90 gear ratio, this differential is optimized for heavy-duty applications where power, durability, and performance under load are essential. Its high torque capacity makes it ideal for trucks that operate in severe service environments, such as construction, regional haul, and off-road applications.

As part of the Meritor MD2014X series, the MD2014X-390 features hypoid gearing and a modular top-load carrier design, which allows for easy maintenance and longevity under rigorous operating conditions. Whether you’re hauling heavy payloads or navigating challenging terrains, this differential provides the strength and dependability required to keep your truck performing at its best.

Key Features

• Model: MD2014X-390
• Series: Meritor MD2014X – Tandem Drive Axle
• Axle Capacity: 40,000 lbs (20,000 lbs per axle)
• Gear Ratio: 3.90:1
• Differential Type: Open (non-locking)
• Gear Design: Hypoid gearing for smooth, efficient power transfer
• Carrier Design: Top-mount modular carrier for easy servicing and durability

Benefits & Applications

• High-Torque Performance: The 3.90:1 gear ratio provides strong torque, making it ideal for heavy-duty tasks like construction, mining, and other severe service applications
• Durable & Long-Lasting: Designed to handle tough environments, the MD2014X-390 ensures consistent performance under challenging conditions
• Fuel Efficiency: The gear ratio strikes a good balance between power output and highway fuel economy for regional and mixed-route service
• Service-Friendly: The modular top-load carrier simplifies repairs, reduces downtime, and enhances ease of maintenance
• OEM Fitment: Designed for direct fit in many popular Class 8 trucks, ensuring compatibility with a wide range of fleets and truck models

At General Truck Parts, we offer both new and remanufactured Meritor MD2014X-390 differentials, thoroughly rebuilt to OEM standards with high-quality components. Each remanufactured unit undergoes a detailed inspection and testing process to ensure reliability and optimal performance.

Whether you’re replacing an old unit or looking for a high-performance upgrade, we have the parts you need, backed by our expert team and reliable customer support. Request a Quote or call us today for availability and pricing.

Technical Specifications:

• Axle Model: MD2014X-390
• Configuration: Tandem rear-drive axle
• Gross Axle Weight Rating (GAWR): 40,000 lbs
• Gear Ratio: 3.90:1
• Differential Type: Open differential (non-locking)
• Input Spline Count: Typically 39 or 41 splines (verify per application)
• Lubrication: Oil-lubricated (85W-140 gear oil recommended)
• Brake Compatibility: Compatible with 16.5″ S-cam drum brakes and air disc brakes
• Suspension Compatibility: Compatible with air ride, multi-leaf spring, and vocational suspensions
• OEM Applications: Commonly used in Freightliner, Kenworth, Mack, International, Peterbilt, Volvo, and other heavy-duty truck brands

Call now to order!

800-621-3914

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