Meritor MD2014X-355

The Meritor MD2014X-355 is a heavy-duty tandem rear-drive axle differential designed for use in Class 8 commercial trucks that require strong pulling power, durability, and dependable performance under load. Featuring a 3.55 gear ratio, this differential is ideal for applications that combine stop-and-go urban driving with highway hauling—making it a great choice for vocational, regional, and mixed-use fleet operations.

As part of Meritor’s highly regarded MD2014X series, the MD2014X-355 offers long service life, high torque capacity, and a modular design that supports easier service and repair.

Key Features

• Model: MD2014X-355
• Series: Meritor MD2014X Tandem Rear Drive Axle
• Axle Rating: 40,000 lbs (20,000 lbs per axle)
• Applications: Class 8 trucks used in regional, vocational, construction, and mixed-route service
• Differential Type: Open (non-locking)
• Gear Design: Hypoid gears for strength and smooth operation
• Carrier Assembly: Top-mounted modular carrier for serviceability

Benefits & Applications

• Strong Pulling Power: The 3.55 gear ratio offers excellent torque for heavy loads and start-stop driving
• Durable & Dependable: Built to withstand high torque and long hours in demanding conditions
• Fuel-Efficient Versatility: Balances performance and fuel economy for mixed highway and urban use
• Serviceable Design: Modular top-load carrier simplifies maintenance and repairs
• OEM-Compatible: Designed for direct replacement in many major heavy-duty truck platforms

At General Truck Parts, we stock both new and remanufactured Meritor MD2014X-355 differentials, rebuilt to exacting OEM specifications. Our reman units undergo rigorous testing for quality and performance and are ready to install with full warranty support.

Need help identifying the correct axle or verifying fitment? Our expert team is ready to assist with part lookup, VIN matching, and quick quotes. Request a Quote or call us today for availability and pricing.

Technical Specifications:

• Axle Model: MD2014X-355
• Configuration: Tandem rear-drive axle
• Gross Axle Weight Rating (GAWR): 40,000 lbs
• Gear Ratio: 3.55:1
• Differential Type: Standard open differential
• Input Spline Count: Typically 39 or 41 splines (confirm per vehicle spec)
• Lubrication: Oil-lubricated (85W-140 gear oil recommended)
• Brake Compatibility: Supports 16.5″ S-cam drum or air disc brakes
• Suspension Compatibility: Works with air ride, multi-leaf, and vocational suspensions
• OEM Compatibility: Common in Freightliner, Kenworth, Peterbilt, International, Mack, and Volvo Class 8 trucks

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