Meritor MD2014X-529

The Meritor MD2014X-529 is a high-capacity tandem rear-drive axle differential engineered for Class 8 trucks operating in the most demanding and extreme-duty environments. With a 5.29:1 gear ratio, this differential is specifically designed to deliver maximum torque output and low-speed power, making it ideal for trucks handling heavy payloads on steep grades, off-road conditions, or constant stop-and-go routes such as mining, logging, refuse, or severe vocational applications.

Built on Meritor’s proven MD2014X platform, the MD2014X-529 features durable hypoid gearing, a modular top-load carrier for ease of maintenance, and compatibility with a wide range of OEM vehicles and suspension systems. This differential prioritizes strength and durability over speed, offering uncompromised performance in the harshest operating conditions.

Key Features

• Model: MD2014X-529
• Series: Meritor MD2014X – Tandem Rear Drive Axle Series
• Axle Rating: 40,000 lbs (20,000 lbs per axle)
• Gear Ratio: 5.29:1
• Differential Type: Standard open (non-locking)
• Gear Design: Hypoid gearing for maximum strength and torque
• Carrier Design: Top-load, modular carrier for easy access and servicing

Applications & Benefits

• High-Torque Output: The 5.29:1 gear ratio delivers maximum low-end torque, perfect for severe grade and off-road performance
• Vocational & Off-Road Excellence: Ideal for refuse trucks, dump trucks, heavy haulers, and logging or mining equipment
• Engineered for Tough Conditions: Built for full-time severe-duty cycles and harsh terrain
• Maintenance-Friendly: Modular top-load carrier simplifies servicing and reduces vehicle downtime
• OEM-Ready Fitment: Direct replacement for factory-installed units in a wide range of heavy-duty trucks

At General Truck Parts, we offer both new and remanufactured Meritor MD2014X-529 differentials, rebuilt to OEM specifications with premium components. Each reman unit is thoroughly inspected, dyno-tested, and warrantied, ensuring reliable performance and long-term value.

Need help confirming your gear ratio or vehicle compatibility? Our drivetrain experts are available to assist with VIN matching, part number verification, and fast shipping across the U.S. Request a Quote or call today to check availability, pricing, and shipping options.

Technical Specifications:

• Axle Model: MD2014X-529
• Configuration: Tandem rear-drive axle
• Gross Axle Weight Rating (GAWR): 40,000 lbs
• Gear Ratio: 5.29:1
• Differential Type: Open (non-locking)
• Input Spline Count: Typically 39 or 41 splines (verify with OEM or VIN)
• Lubrication: Oil bath system (85W-140 gear oil recommended)
• Brake Compatibility: Supports 16.5″ S-cam drum and air disc brakes
• Suspension Compatibility: Works with air ride, multi-leaf spring, and vocational suspensions
• OEM Fitment: Found in trucks from Freightliner, Kenworth, Mack, International, Peterbilt, Volvo, and other Class 8 platforms

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