RockJock Double Adjustable Rear Upper Johnny Joint Control Arms

2007–2026 Jeep Wrangler JK/JL 3.6L/3.8L V6, 2.0L Turbo, 3.0L EcoDiesel, 6.4L 392

Part #: CE-9807RUAB

Overview

The RockJock Double 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. These control arms provide superior suspension tuning capabilities by allowing precise length adjustment without the need to remove the arms from the vehicle. Designed for off-road enthusiasts and Jeep owners who have installed suspension lifts, these arms enable optimal pinion angle correction and improved driveline geometry, enhancing both performance and durability on demanding terrain.

Whether upgrading to a new lift height or fine-tuning your existing setup, RockJock’s double adjustable design ensures your Jeep’s rear suspension remains properly aligned and responsive. This product is ideal for those seeking long-term suspension flexibility and maximum articulation in challenging off-road conditions.

Key Features

These rear upper control arms combine robust construction with advanced adjustability to deliver exceptional performance and reliability:

• Double adjustable length via right-hand and left-hand threaded adjuster ends for precise pinion angle tuning
• Allows adjustment after lift installation without removing either end of the control arm
• Compatible with multiple lift heights, eliminating the need for future control arm replacements
• Constructed from 1 1/2 inch outside diameter solid steel bar for superior strength
• Equipped with 2 inch Johnny Joint rod ends on both sides for maximum articulation and durability
• Jam nuts included on both ends to securely lock adjustments in place
• Finished in a semi-gloss black powder coat for corrosion resistance and a sleek appearance
• Designed to work seamlessly with the CE-9102JK Johnny Joint kit for front differential articulation

Construction & Design

RockJock’s rear upper control arms are built from heavy-duty 1 1/2 inch solid steel bar stock, providing exceptional rigidity and resistance to bending or flexing under extreme off-road stresses. The use of 2 inch Johnny Joint rod ends on both ends ensures smooth articulation and reduces binding, which is critical for maintaining suspension geometry during articulation and articulation travel.

The double adjustable design features both right-hand and left-hand threaded ends, allowing for easy length modification without disassembly. This thoughtful engineering enables quick pinion angle adjustments after lift installation or when changing lift heights, preserving driveline health and improving overall vehicle handling.

A durable semi-gloss black powder coat finish protects the control arms from corrosion, road debris, and harsh environmental conditions, ensuring long-lasting performance and a clean, professional look.

Installation & Fitment

Installation of the RockJock Double Adjustable Rear Upper Johnny Joint Control Arms is straightforward for experienced mechanics and off-road enthusiasts familiar with suspension upgrades. The adjustable ends allow for fine-tuning without removing the arms, simplifying alignment and reducing installation time. These control arms are designed to fit a wide range of Jeep Wrangler JK and JL models from 2007 to 2026, covering multiple engine variants including the 3.6L and 3.8L V6, 2.0L Turbo, 3.0L EcoDiesel, and 6.4L 392.

No major modifications are required, but proper torque specifications and alignment procedures should be followed to ensure optimal performance and safety. For maximum articulation, pairing these arms with the CE-9102JK Johnny Joint kit on the front differential is recommended.

What's Included

• One pair of RockJock Double Adjustable Rear Upper Johnny Joint Control Arms
• Jam nuts for secure adjustment locking
• Installation hardware (if applicable, verify with retailer)
• Instructions for adjustment and installation guidance

Ideal For

This product is perfect for Jeep Wrangler JK and JL owners who have installed or plan to install suspension lifts and require precise control over rear pinion angles. Off-road enthusiasts seeking enhanced articulation, improved driveline geometry, and durable components to withstand rugged terrain will benefit greatly from these adjustable control arms. Additionally, those looking to future-proof their suspension setup against lift upgrades will appreciate the versatility and adjustability offered by RockJock’s design.

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.