ATS Diesel 01+ GM / 03+ Dodge 14-Bolt 11.5in American Axle ATS Protector Rear Differential Cover

This ATS Diesel differential cover supports improved lubrication, cooling, and service access for the specified axle. Match the axle itself, not only the truck year and model. Review the verified fitment, exact configuration, specifications, included components, and installation requirements below before ordering.

Key Features

• Increased Capacity: Deep sump design adds 2.5 quarts of fluid for better lubrication and longevity of ring and pinion gears.
• O-Ring Gasket: Precision-machined O-ring provides a leak-proof seal without RTV silicone for easy installation.
• Heavy-Duty Walls: 0.5-inch thick aluminum construction resists impacts and maintains structural integrity in rough terrain.
• Direct bolt-on replacement using factory mounting holes.
• Includes all necessary hardware, bolts, and O-ring gasket for direct fit.
• Cast aluminum builds withstand extreme torque and impacts.

Fitment

Specifications

What’s Included

One new ATS Diesel component in the exact configuration shown. Gaskets, hardware, wiring, fittings, fluids, filters, tuning, and companion parts are included only when the manufacturer listing expressly states they are part of this exact configuration.

About ATS Diesel Performance

ATS Diesel Performance develops transmission, turbocharger, exhaust, fuel-system, and drivetrain components for Dodge, Ram, Ford, and GM diesel trucks. Product selection remains exact-application specific.

Related ATS Diesel Parts

• ATS Diesel Ford Sterling 12-Bolt 10.25in Ring Gear Diff Cover
• ATS Diesel 11-14 Ford Pickup 6.7L Power Stroke Aurora 4000 VNT Stage 2 Turbocharger Kit
• ATS Diesel 11-16 Ford Cab & Chassis 6.7L Power Stroke Aurora 4000 VNT Stage 2 Turbocharger Kit

Browse the ATS Diesel collection for additional transmission, turbocharger, fuel-system, and drivetrain components.

Frequently Asked Questions

Does this differential cover fit 1999-2002, 2001-2005, 2004-2010, 2006, 2006-2010, 2007-2014, 2011-2012 Chevrolet Express 2500, Chevrolet Express 3500, Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500, Chevrolet Silverado 3500 HD, Dodge Ram 2500, Dodge Ram 3500, GMC Savana 2500, GMC Savana 3500, GMC Sierra 2500 HD, GMC Sierra 3500, GMC Sierra 3500 HD, Hummer H1, Ram 2500, Ram 3500?
Those are the verified vehicle applications. Also confirm 6.6L Duramax, production split, factory equipment, and every ATS application note before ordering.

How do I confirm the axle before ordering this cover?
Identify the axle by housing, bolt pattern, ring-gear size, casting or axle tag, and vehicle application. Do not select a differential cover from year and model alone.

How should the differential be filled after installation?
Use the specified gear oil and friction modifier, if required. Fill to the ATS or axle-manufacturer level and recheck for leaks after the first heat cycle.

Installation Instructions

Use the current ATS Diesel instructions and vehicle service information. Verify the exact application, required tools, fasteners, seals, fluids, calibration, torque values, clearances, and startup or relearn procedure. Professional installation is recommended for internal transmission, turbocharger, fuel-system, and driveline work.