Tuff Country Axle Shims

2003–2024 Dodge Ram 2500/3500 5.7L/6.4L/6.7L Diesel

Part #: 90017

Overview

Tuff Country 2° Axle Shims are precision-engineered components designed to optimize the rear differential angle on Dodge Ram 2500 and 3500 trucks equipped with leaf spring suspensions. These shims are essential for drivers who have installed lift kits that alter the rear axle positioning, often resulting in unwanted rear end vibrations. By correcting the pinion angle, these axle shims help eliminate or significantly reduce driveline vibrations, improving ride quality and drivetrain longevity.

Specifically crafted to fit a wide range of Dodge Ram models from 2003 through 2024, including various diesel and HEMI engine configurations, these axle shims provide a reliable and durable solution for maintaining proper rear differential alignment after suspension modifications.

Key Features

Designed for durability and precision, the Tuff Country axle shims offer the following benefits:

• Corrects rear differential pinion angle by 2° to reduce driveline vibrations
• Compatible with leaf spring rear suspensions on Dodge Ram 2500 and 3500 models
• 3-inch wide shim plates with 1/2-inch alignment pins for secure fitment
• Constructed to withstand heavy-duty off-road and towing conditions
• Easy to install with existing suspension components—no major modifications required
• Helps extend the life of U-joints and driveshaft components by reducing stress
• Fits a broad range of engines including 5.7L HEMI, 6.4L HEMI, 6.7L Cummins Diesel, and 5.9L Diesel variants
• Compatible with lift kits that raise the rear suspension height

Construction & Design

Tuff Country axle shims are manufactured from high-strength steel to ensure long-lasting performance under demanding conditions. The 3-inch width provides ample surface area for secure mounting, while the 1/2-inch pins guarantee precise alignment and prevent shim movement during operation. The shims are engineered to maintain structural integrity even when subjected to the stresses of lifted suspension setups and heavy payloads.

Each shim is designed with tight tolerances to ensure a perfect fit with factory and aftermarket components, preserving the original geometry of the rear axle assembly while correcting pinion angle deviations caused by suspension lifts.

Installation & Fitment

Installation of the Tuff Country axle shims is straightforward for anyone familiar with rear axle and suspension work. The shims are placed between the axle housing and leaf spring perch, adjusting the pinion angle by 2° to realign the driveshaft. No welding or permanent modifications are necessary, making it a reversible upgrade.

These axle shims are compatible with the following Dodge Ram models and engine configurations:

• 2003–2007 Dodge Ram 2500 and 3500 with 5.9L Diesel
• 2003–2010 Dodge Ram 2500 and 2003–2009 Dodge Ram 3500 with 5.7L HEMI
• 2008–2010 Dodge Ram 2500 and 2008–2009 Dodge Ram 3500 with 6.7L Diesel
• 2011–2013 Ram 2500 and 2011–2024 Ram 3500 with 6.7L Diesel
• 2014–2024 Ram 3500 with 6.4L 392 HEMI
• 2011–2013 Ram 2500 and 2011–2018 Ram 3500 with 5.7L HEMI

What's Included

• One pair of 2° axle shims, 3 inches wide
• 1/2-inch alignment pins integrated into each shim
• Installation instructions

Ideal For

This product is ideal for Dodge Ram owners who have installed lift kits and are experiencing rear end vibrations due to altered pinion angles. It is especially beneficial for off-road enthusiasts, heavy-duty truck users, and anyone seeking to maintain drivetrain reliability and smooth operation after suspension modifications. Whether towing, hauling, or navigating rugged terrain, these axle shims help ensure a quieter, smoother ride and protect critical drivetrain components.

Tuff Country builds lift kits, leveling kits, and suspension components aimed at improving off-road clearance and capability for trucks, SUVs, and Jeeps. With a focus on durability and enthusiast fitment, Tuff Country systems help owners run larger tires and tackle rougher terrain while maintaining solid on-road drivability.