RockJock Adjustable Rear Upper Johnny Joint Control Arms

2007–2026 Jeep Wrangler JK/JL 3.6L/3.8L V6 and More

Part #: CE-9807RUA

Overview

The RockJock Adjustable Rear Upper Johnny Joint Control Arms are engineered specifically for Jeep Wrangler JK and JL models from 2007 through 2026, including various engine options such as the 3.6L V6, 3.8L V6, 2.0L Turbo, 3.0L EcoDiesel, and the powerful 6.4L 392. Designed to enhance suspension performance and driveline geometry, these adjustable control arms allow precise pinion angle correction after installing a suspension lift. This adjustability ensures optimal driveline alignment, reducing vibrations and improving overall ride quality.

Ideal for off-road enthusiasts and Jeep owners who frequently upgrade or modify their suspension, these control arms provide the flexibility to accommodate different lift heights without the need for replacement. This makes them a durable, long-term solution for maintaining proper suspension geometry and vehicle handling.

Key Features

RockJock’s rear upper control arms combine robust construction with advanced adjustability to meet the demands of lifted Jeep Wranglers. Key features include:

• Length-adjustable design for precise pinion angle tuning after lift installation
• Compatibility with multiple Jeep Wrangler models and engine types from 2007 to 2026
• Fabricated from 1.25 inch outer diameter, 0.188 inch wall DOM steel tubing for superior strength
• Equipped with 2.5 inch Johnny Joint rod ends for maximum articulation and durability
• One end features a forged 1.25 inch right-hand thread Johnny Joint with jam nut for secure adjustment
• Semi-gloss black powder coat finish for corrosion resistance and rugged appearance
• Gold zinc plating on forged ends to enhance corrosion protection and longevity
• Designed to accommodate future suspension lift upgrades without replacement

Construction & Design

These control arms are crafted from DOM (Drawn Over Mandrel) steel tubing, known for its exceptional strength and resistance to bending or flexing under heavy loads. The 1.25 inch outer diameter and 0.188 inch wall thickness provide a robust yet lightweight structure capable of withstanding harsh off-road conditions.

The use of 2.5 inch Johnny Joint rod ends at both ends ensures superior articulation and smooth movement throughout the suspension travel. The forged Johnny Joint on one end includes a jam nut and right-hand thread, allowing precise length adjustments to fine-tune pinion angles. The semi-gloss black powder coat finish protects the arms from rust and abrasion, while the gold zinc plating on the forged ends adds an extra layer of corrosion resistance, ensuring long-lasting performance.

Installation & Fitment

Installation of the RockJock Adjustable Rear Upper Johnny Joint Control Arms is straightforward for experienced mechanics and off-road enthusiasts familiar with suspension upgrades. These arms are designed as direct replacements for the factory rear upper control arms on Jeep Wrangler JK and JL models within the specified years and engine configurations.

The adjustable length feature allows for easy pinion angle correction after suspension lifts, eliminating the need for additional modifications or parts. No welding or cutting is required, and the included jam nuts secure the adjustments firmly in place. Proper alignment after installation is recommended to maximize driveline performance and minimize vibrations.

What's Included

• Pair of RockJock Adjustable Rear Upper Johnny Joint Control Arms
• 2.5 inch Johnny Joint rod ends installed on both ends
• Jam nuts for secure length adjustment
• Installation hardware (if applicable)
• Instructions for adjustment and installation

Ideal For

This product is ideal for Jeep Wrangler JK and JL owners who have installed or plan to install suspension lifts and require precise driveline geometry correction. Off-road enthusiasts seeking durable, adjustable control arms to maintain optimal pinion angles and reduce vibrations will benefit greatly. Additionally, those who anticipate future suspension upgrades will appreciate the versatility and longevity offered by these adjustable arms.

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.