RockJock Coil Spring Shim Pack

2018–2026 Jeep Wrangler & Gladiator 2.0L Turbo, 3.6L V6, 3.0L EcoDiesel, 6.4L 392

Part #: RJ-107SHIM-BDL

Overview

The RockJock Coil Spring Shim Pack is an essential accessory for Jeep enthusiasts who demand precise suspension tuning on their custom builds. Designed specifically for Jeep Wrangler and Gladiator models from 2018 through 2026, this shim pack allows you to fine-tune your coil springs by adjusting the lean of the suspension. Unlike traditional coil spring spacers, these shims are inserted between the welded coil spring axle pad and the coil spring isolator, providing subtle but effective adjustments to your suspension setup.

Whether you’re loading your Jeep with gear, upgrading suspension components, or simply seeking improved ride quality and handling, having this shim pack on hand ensures you can dial in the perfect coil spring alignment for your unique build and driving conditions.

Key Features

RockJock’s Coil Spring Shim Pack offers precise suspension tuning capabilities with the following features:

• Includes four shims of varying thicknesses for front and rear coil springs
• 3/16 inch and 1/4 inch thick shims for front coil springs
• 3/16 inch and 1/4 inch thick shims for rear coil springs
• Designed to be installed between the coil spring axle pad and coil spring isolator
• Allows fine adjustment of coil spring lean without acting as a spacer
• Compatible with multiple Jeep Wrangler JL/JT and Gladiator JT models
• Durable construction engineered for off-road and daily driving conditions
• Helps maintain proper suspension geometry under load or after modifications

Construction & Design

Each shim in the RockJock Coil Spring Shim Pack is crafted from high-quality materials engineered to withstand the rigors of off-road use and daily driving. The shims are precision-cut to ensure a perfect fit between the coil spring axle pad and the isolator, preventing unwanted movement or noise. Their robust design maintains suspension integrity while allowing subtle adjustments to coil spring positioning. This attention to detail ensures long-lasting performance and durability, even under heavy loads or challenging terrain.

Installation & Fitment

Installation of the RockJock Coil Spring Shim Pack is straightforward for anyone familiar with coil spring suspension systems. The shims are placed directly between the welded coil spring axle pad and the coil spring isolator, allowing you to adjust the lean of the coil springs without the need for additional spacers or modifications. This makes it an ideal solution for fine-tuning suspension geometry after adding aftermarket components or carrying extra weight.

The shim pack is specifically designed to fit the following vehicles:

• 2018–2026 Jeep Wrangler 2.0L Turbo
• 2018–2026 Jeep Wrangler 3.6L V6
• 2021–2026 Jeep Wrangler 6.4L 392
• 2020–2023 Jeep Wrangler 3.0L EcoDiesel
• 2020–2026 Jeep Gladiator 3.6L V6
• 2021–2023 Jeep Gladiator 3.0L EcoDiesel

What's Included

• One 3/16 inch thick front coil spring shim for JL/JT
• One 1/4 inch thick front coil spring shim for JL/JT
• One 3/16 inch thick rear coil spring shim for JL
• One 1/4 inch thick rear coil spring shim for JL

Ideal For

This shim pack is ideal for Jeep owners and off-road enthusiasts who build custom vehicles and require precise suspension tuning. It is especially useful for those who frequently carry heavy loads, install aftermarket suspension components, or seek to optimize ride quality and handling on their Jeep Wrangler or Gladiator. Having these shims on hand allows for quick adjustments to suspension lean, ensuring your vehicle performs optimally in a variety of driving conditions.

RockJock 4x4 by John Currie develops trail-proven suspension and steering components for Jeeps and modern off-road platforms, including complete lift systems and the well-known AntiRock sway bar setups. Built around durable, articulation-friendly designs, RockJock is a go-to for enthusiasts who want confident road manners and real capability when the terrain gets technical.