RockJock Johnny Joint Control Arms

2007–2018 Jeep Wrangler JK 3.6L/3.8L V6

Part #: CE-9807FUA

Overview

The RockJock Johnny Joint Adjustable Front Upper Control Arms are engineered specifically for Jeep Wrangler JK and JK Unlimited models from 2007 through 2018 equipped with 3.6L or 3.8L V6 engines. These control arms provide essential length adjustability, allowing precise pinion angle tuning after installing a suspension lift. This adjustability ensures optimal drivetrain alignment and reduces premature wear on components, enhancing both on- and off-road performance.

Designed for Jeep enthusiasts who demand durability and flexibility, these control arms accommodate various lift heights without the need for replacement, making them a smart long-term upgrade for lifted JK Wranglers. Whether you’re upgrading your suspension or seeking improved articulation, RockJock’s Johnny Joint control arms deliver reliable performance and adjustability.

Key Features

RockJock’s Johnny Joint Control Arms combine innovative design with rugged construction to meet the demands of lifted Jeep Wranglers. Key features include:

• Adjustable length design for precise pinion angle correction after suspension lifts
• Compatibility with multiple lift heights, eliminating the need for future control arm replacements
• Fabricated from 1.25 inch outer diameter, 0.188 inch wall DOM steel tubing for superior strength
• Equipped with a 2 inch Johnny Joint rod end on one side for enhanced articulation and durability
• Formed steel fork and jam nut on the opposite end for secure, adjustable mounting
• Finished in a semi-gloss black powder coat for corrosion resistance and a clean appearance
• Designed to work seamlessly with the CE-9102JK Johnny Joint kit for maximum front differential articulation
• Precision engineering ensures improved suspension geometry and drivetrain longevity

Construction & Design

Each control arm is crafted from DOM (Drawn Over Mandrel) steel tubing, known for its exceptional strength and consistent wall thickness, ensuring durability under extreme off-road conditions. The 1.25 inch diameter tubing with a 0.188 inch wall thickness balances rigidity with weight savings, providing a robust yet manageable component.

The Johnny Joint rod end is a key design element, offering superior articulation compared to traditional rubber or polyurethane bushings. This rod end allows the control arm to pivot smoothly, reducing binding and stress on suspension components during articulation. The formed steel fork and jam nut assembly on the opposite end provide a secure and adjustable connection point, allowing fine-tuning of arm length to match suspension lift requirements.

The semi-gloss black powder coat finish protects against rust and corrosion, ensuring long-lasting performance and a professional appearance even after exposure to harsh environments.

Installation & Fitment

Installation of the RockJock Johnny Joint Adjustable Front Upper Control Arms is straightforward for experienced mechanics and off-road enthusiasts familiar with suspension upgrades. These control arms are designed to directly replace the factory front upper control arms on 2007–2018 Jeep Wrangler JK and JK Unlimited models with 3.6L or 3.8L V6 engines.

The adjustable length feature allows installers to set the correct pinion angle after lifting the vehicle, which is critical to prevent driveline vibrations and premature wear. No additional modifications are typically required, but alignment and pinion angle measurements are recommended to ensure optimal setup. For maximum articulation, pairing these arms with the RockJock CE-9102JK Johnny Joint kit on the front differential is advised.

What’s Included

• Pair of RockJock Johnny Joint Adjustable Front Upper Control Arms
• Formed steel forks and jam nuts for adjustment
• 2 inch Johnny Joint rod ends pre-installed
• Installation hardware not included (vehicle-specific hardware reuse recommended)

Ideal For

These adjustable control arms are ideal for Jeep Wrangler JK owners who have installed or plan to install suspension lifts ranging from mild to moderate heights. Off-road enthusiasts seeking improved suspension articulation and drivetrain alignment will benefit from the Johnny Joint design. Additionally, those looking for a durable, long-lasting upgrade that adapts to future suspension changes without replacement will find these control arms an excellent investment.

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.