aFe Power Front & Rear Diff Guard Package

2003–2013 Dodge / RAM 2500/3500 5.9L & 6.7L Cummins

Part #: 46-7700AB

Overview

The aFe Power Front & Rear Diff Guard Package is engineered to provide superior protection and enhanced performance for the front and rear differentials of Dodge and RAM 2500/3500 trucks equipped with 5.9L and 6.7L Cummins engines from 2003 to 2013. Designed for truck owners who demand durability and reliability under heavy-duty conditions, this comprehensive kit safeguards your drivetrain components from damage caused by off-road obstacles, debris, and harsh driving environments.

Beyond protection, this package improves heat dissipation and extends the life of your differential oil, ensuring your drivetrain operates efficiently even under extreme loads. It’s an ideal upgrade for enthusiasts, fleet operators, and anyone looking to maintain peak performance and durability in their Cummins-powered trucks.

Key Features

This complete diff guard package combines robust construction with advanced engineering to deliver outstanding benefits:

• Durable cast aluminum differential covers with reinforced ribs for increased strength and impact resistance
• Enhanced oil capacity compared to stock covers, allowing for better lubrication and longer service intervals
• Built-in internal and external cooling fins that improve heat dissipation by transferring heat from the oil to the surrounding air
• Includes 8 quarts of 75W-90 premium PROGUARD Synthetic gear oil, exceeding API GL-5 standards for both open and limited slip differentials
• Magnetic drain plugs and deep reach fill plugs designed to capture metal particles and contaminants, protecting internal components
• Calibration plug sets to maintain factory oil levels and prevent overfilling
• Oil level sight glass for quick and easy visual inspection of fluid levels without removing the cover
• Complete hardware kit included for a hassle-free installation

Construction & Design

The differential covers are precision cast from high-quality aluminum, chosen for its excellent strength-to-weight ratio and thermal conductivity. Reinforced ribs add structural rigidity to withstand impacts and rough terrain, while the integrated cooling fins maximize heat transfer to keep gear oil temperatures in check. This design helps prevent overheating and premature wear of differential components.

Every detail, from the magnetic drain plugs to the calibrated fill plugs, is engineered to enhance durability and ease of maintenance. The sight glass provides a convenient way to monitor oil condition and level, reducing downtime and improving reliability.

Installation & Fitment

This package is a direct fit for 2003 through 2013 Dodge and RAM 2500/3500 trucks equipped with 5.9L and 6.7L Cummins engines. Installation is straightforward with no modifications required. The kit includes all necessary hardware and premium synthetic gear oil, enabling a complete differential service during installation. Whether upgrading worn stock covers or replacing damaged components, this kit offers a professional-grade solution that can be installed with basic hand tools.

What's Included

• Front differential cover
• Rear differential cover
• Complete hardware kit for both covers
• 8 quarts of 75W-90 PROGUARD Synthetic gear oil
• Magnetic drain plugs and deep reach fill plugs
• Calibration plug sets for factory oil level accuracy

Ideal For

This diff guard package is perfect for Dodge and RAM 2500/3500 owners who use their trucks for towing, hauling, off-roading, or heavy-duty work. It is especially beneficial for those seeking to extend the life of their drivetrain components while improving cooling and maintenance convenience. Whether you’re a professional operator or an enthusiast, this kit provides peace of mind and enhanced durability for your Cummins-powered truck.

aFe POWER (Advanced FLOW Engineering) offers dyno-proven intake, filtration, and exhaust upgrades aimed at measurable performance gains. The brand’s lineup is geared toward enthusiasts looking for better airflow, improved sound, and durable materials—from cold air intakes to stainless exhaust systems for street and track applications.

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