SuperPro Upper Trailing Arm Set: Jeep Wrangler JK (07-17) / Wrangler JK 2018

SuperPro Upper Trailing Arm Set

2007–2018 Jeep Wrangler JK / Wrangler JK Unlimited

TRC1188

Overview:

The SuperPro Upper Trailing Arm Set is engineered specifically for Jeep Wrangler JK models from 2007 through 2018, including both standard and Unlimited versions. Designed for lifted vehicles up to 4 inches, this set includes left and right front upper control arms that are off-car adjustable to correct pinion angle and restore or add positive caster. Ideal for Jeep owners seeking to enhance both off-road durability and on-road handling, these control arms improve suspension geometry and vehicle stability after lift installation.

Whether you’re upgrading your suspension for rugged trail performance or daily driving, the SuperPro Upper Trailing Arm Set offers a robust, adjustable solution that balances improved articulation with refined road manners. This kit is a direct replacement that can be used alone or combined with other SuperPro adjustable control arms for a comprehensive suspension upgrade.

Key Features:

Built to meet the demands of lifted Jeep Wrangler JK vehicles, this control arm set delivers precise adjustability and long-lasting performance. Key features include:

• Off-car adjustable design for accurate pinion angle correction and caster adjustment
• Compatible with lifted Jeep Wrangler JKs up to 4 inches
• Supplied as a complete, fully assembled kit for straightforward installation
• Fitted with SuperPro’s proprietary bushings optimized for durability and reduced noise, vibration, and harshness (NVH)
• Enhances both off-road articulation and on-road stability
• Developed and tested by SuperPro’s Australian R&D team to ensure reliability and performance
• Can be paired with SuperPro HD adjustable rear lower and front control arms for a full suspension upgrade
• Restores suspension geometry compromised by lift kits, improving caster and driveline angles

Construction & Design:

The SuperPro Upper Trailing Arm Set features high-quality materials and precision engineering to withstand the rigors of off-road use while maintaining daily drivability. Each arm is constructed from robust steel components designed to resist bending and fatigue under heavy loads. The arms come pre-assembled with SuperPro’s advanced polyurethane bushings, which provide superior wear resistance and maintain suspension compliance without introducing unwanted noise or harshness.

Adjustability is built into the design, allowing for fine-tuning of pinion angles and caster settings off the vehicle. This ensures optimal driveline alignment and suspension geometry, which is critical for lifted vehicles to prevent premature wear and improve handling characteristics.

Installation & Fitment:

Installation of the SuperPro Upper Trailing Arm Set is straightforward for experienced mechanics and enthusiasts familiar with suspension work. The arms are designed as direct replacements for the factory components on Jeep Wrangler JK models from 2007 to 2018, including Rubicon, Sahara, Sport, Sport S, X, and special anniversary editions. No major modifications are required, though alignment adjustments are recommended after installation to maximize performance benefits.

This kit is compatible with lifted vehicles up to 4 inches, making it an ideal upgrade for those who have installed suspension lifts and need to correct driveline angles and caster for improved handling and durability.

What's Included:

• Left Front Upper Trailing Arm (fully assembled)
• Right Front Upper Trailing Arm (fully assembled)
• SuperPro polyurethane bushings pre-installed
• Adjustment hardware for pinion angle and caster correction
• Installation instructions

Ideal For:

This upper trailing arm set is perfect for Jeep Wrangler JK owners who have installed or plan to install a suspension lift up to 4 inches and want to maintain or improve suspension geometry and driveline angles. It suits off-road enthusiasts seeking enhanced durability and articulation, as well as daily drivers who desire improved on-road handling and reduced drivetrain vibration. It is also an excellent choice for those performing a full suspension upgrade in combination with SuperPro’s HD adjustable lower control arms.