Meritor MD2014X-433

The Meritor MD2014X-433 is a premium tandem rear-drive axle differential engineered for the toughest Class 8 trucking applications where maximum torque and gradeability are essential. With a 4.33:1 gear ratio, this model is specifically designed for vocational trucks and severe-service environments such as construction, refuse, logging, and off-road hauling.

Built on Meritor’s proven MD2014X platform, the MD2014X-433 features heavy-duty hypoid gearing and a modular, top-load carrier for simplified service and long-term durability. It’s designed to handle high gross combination weights, steep inclines, and demanding start-stop conditions while maintaining dependable performance in extreme environments.

Key Features

• Model: MD2014X-433
• Series: Meritor MD2014X – Tandem Rear Drive Axle Series
• Axle Rating: 40,000 lbs (20,000 lbs per axle)
• Gear Ratio: 4.33:1
• Differential Type: Standard open (non-locking)
• Gear Design: Hypoid gears for smooth torque transfer and strength
• Carrier Type: Modular, top-load design for easy maintenance and rebuilds

Applications & Benefits

• Severe-Duty Performance: The 4.33 gear ratio offers high torque output for off-road, low-speed, and steep grade operation
• Vocational Ready: Ideal for construction, dump, refuse, mixer, and logging trucks
• Durability Under Load: Withstands high torque and stress in rugged environments
• Serviceable Carrier: Top-load modular design enables faster service with less downtime
• OEM-Ready Fitment: Meets factory specs for easy replacement or upgrade

At General Truck Parts, we offer both new and remanufactured Meritor MD2014X-433 differentials, built or rebuilt to OEM specifications using high-quality components and tested for performance. Our remanufactured units undergo full inspection and dynamic testing to ensure they deliver like-new reliability at a lower cost.

Need help verifying fitment or determining the best gear ratio? Our drivetrain experts are ready to assist with VIN lookups, cross-references, and fast nationwide shipping. Request a Quote or call today to check availability, pricing, and shipping options.

Technical Specifications:

• Axle Model: MD2014X-433
• Configuration: Tandem rear-drive axle
• Gross Axle Weight Rating (GAWR): 40,000 lbs
• Gear Ratio: 4.33:1
• Differential Type: Open (non-locking)
• Input Spline Count: Typically 39 or 41 splines (confirm per vehicle spec)
• Lubrication System: Oil bath (85W-140 gear oil recommended)
• Brake Compatibility: Supports 16.5″ S-cam drum and air disc brakes
• Suspension Compatibility: Compatible with air ride, leaf spring, and vocational suspensions
• OEM Fitment: Found in Freightliner, Kenworth, Mack, International, Peterbilt, Volvo, and more

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800-621-3914

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