Rancho Sport Suspension System Component Box 2
2021–2023 Jeep Wrangler Unlimited High Altitude 4xe, Rubicon 4xe, Sahara 4xe
RS66136B-2
Overview:
The Rancho Sport Suspension System Component Box 2 is a vital part of the Rancho 3-inch suspension lift kit designed specifically for the 2021 to 2023 Jeep Wrangler Unlimited 4xe models, including High Altitude, Rubicon, and Sahara trims. Engineered to enhance both on-road comfort and off-road capability, this premium suspension upgrade provides the additional ground clearance and improved handling needed for serious trail enthusiasts and daily drivers alike. With corner-specific progressive rate coil springs and compatibility with the Jeep’s electronic stability system, this kit ensures a balanced, stable ride whether navigating rocky terrain or cruising city streets.
This component box is the second of two required boxes to complete the full suspension system upgrade. It is designed to work seamlessly with the vehicle’s advanced driver-assistance systems (ADAS), though professional recalibration is necessary post-installation to maintain warranty coverage and system functionality.
Key Features:
Rancho’s Sport Suspension System Component Box 2 offers a comprehensive set of features engineered for durability, performance, and ease of use:
- Front and rear corner-specific progressive rate coil springs tuned for superior ride comfort and off-road performance
- Designed to accommodate up to 35-inch tires on 17-inch wheels with 4.5-inch backspacing
- Includes bump stops and extended sway bar end links for improved suspension articulation and stability
- Electronic parking brake line relocation bracket included for proper fitment and function
- Compatible with Jeep’s factory electronic stability control system, preserving OE wheel and tire use
- Brackets fabricated from high-strength, low-alloy steel for long-lasting durability
- Tested to comply with NHTSA FMVSS126 safety standards
- Supports a 3-inch lift for enhanced ground clearance ideal for rock crawling and trail riding
- Limited lifetime warranty from Rancho ensures confidence in quality and performance
Construction & Design:
Rancho’s suspension components are engineered with precision and built to withstand the rigors of off-road use. The coil springs are progressive rate, meaning they provide a smooth, comfortable ride on pavement while firming up under heavy loads or rough terrain to maintain vehicle stability. The brackets and hardware are constructed from high-strength, low-alloy steel, offering excellent resistance to wear and corrosion. This robust design ensures that the suspension system maintains its geometry and performance over time, even under demanding conditions.
Special attention is given to compatibility with the Jeep Wrangler’s electronic stability system, allowing the suspension to work harmoniously with factory safety features without compromising ride quality or handling.
Installation & Fitment:
The Rancho Sport Suspension System Component Box 2 is designed for bolt-on installation, making it a straightforward upgrade for experienced DIYers or professional installers. It fits 4-door Jeep Wrangler JL Unlimited 4xe models from 2021 through 2023, including High Altitude, Rubicon, and Sahara trims. Note that non-4xe and diesel models are excluded, and non-Rubicon trims will achieve a slightly taller lift height.
Because the suspension system interacts with advanced driver-assistance systems (ADAS), recalibration by a qualified technician is required after installation to maintain vehicle safety and Rancho’s warranty coverage. The kit ships in two boxes; this is box 2 of 2, so be sure to order both RS66136B-1 and RS66136B-2 for a complete suspension upgrade.
What's Included:
- Four front and rear corner-specific progressive rate coil springs
- Bump stops for front and rear suspension
- Extended sway bar end links (front and rear)
- Electronic parking brake line relocation bracket
- All necessary hardware for installation
- Note: Shocks are sold separately
Ideal For:
This suspension system is ideal for Jeep Wrangler 4xe owners who want to improve their vehicle’s off-road capability without sacrificing on-road comfort. It is perfect for enthusiasts who enjoy rock crawling, trail riding, and require additional ground clearance for aftermarket accessories such as bumpers, sliders, and winches. Additionally, it suits drivers who want a reliable, durable suspension upgrade that maintains factory safety system compatibility and supports larger tires up to 35 inches.
