Rancho Short Arm Suspension System

2007–2018 Jeep Wrangler / Wrangler JK

RS66114B-3

Overview:

The Rancho Short Arm Suspension System Component Box Three is a critical part of the complete 4-inch lift kit designed specifically for Jeep Wrangler models from 2007 through 2018, including both the Wrangler JK and earlier Wrangler versions. This suspension upgrade enhances your Jeep’s off-road capability by providing increased ground clearance and improved wheel travel, allowing for better performance on rugged trails and rocky terrain. Ideal for Jeep enthusiasts seeking a balance of on-road comfort and off-road durability, this kit delivers a reliable and progressive suspension solution engineered to handle demanding conditions.

With its adjustable control arms and progressive rate coil springs, the system is tailored to maintain ride quality while offering the necessary lift and articulation for larger tires and challenging terrain. Whether you’re upgrading for rock crawling, trail riding, or everyday driving, this Rancho suspension component ensures your Jeep performs at its best.

Key Features:

This suspension system component includes advanced features designed to maximize performance and longevity:

• Includes front and rear progressive rate coil springs tuned for superior on-road comfort and off-road capability
• Adjustable upper and lower control arms with Rancho’s D2 high-articulation, grease-free bushings reduce wear and improve articulation
• Heavy-duty front and rear adjustable track bars for precise alignment and enhanced stability
• Extended sway bar end links to accommodate increased suspension travel
• Bump stop spacers included to prevent suspension damage during extreme articulation
• Brackets fabricated from high-strength, low-alloy steel for durability and long service life
• Designed to fit up to 37-inch tires, providing 4 inches of additional ground clearance
• Meets NHTSA FMVSS126 safety standards for vehicle stability
• Maintenance-free bushings eliminate the need for greasing and reduce long-term upkeep
• Comes with Rancho’s limited lifetime warranty for peace of mind

Construction & Design:

Rancho engineered this suspension component box with rugged durability in mind. The brackets and control arms are constructed from high-strength, low-alloy steel, ensuring resistance to bending and fatigue under harsh off-road conditions. The bolt-on design simplifies installation while maintaining a secure and precise fit. The use of progressive rate coil springs allows the suspension to adapt dynamically to varying terrain, providing a smooth ride on pavement and firm support off-road.

Rancho’s proprietary D2 bushings are grease-free and designed to rotate within the sleeve without resistance, significantly reducing wear and extending the lifespan of suspension components. This thoughtful engineering minimizes maintenance requirements and enhances articulation for improved off-road performance.

Installation & Fitment:

This component box is part three of a three-box master kit (RS66114B) and must be ordered alongside boxes one and two for a complete suspension upgrade. Installation is straightforward with a bolt-on design, but professional installation is recommended to ensure proper alignment and safety. For 2012–2018 Jeep Wrangler models not replacing the front driveshaft, a Rancho or DynoMax exhaust crossover pipe is required (sold separately) to accommodate the lift.

The system is compatible with both 2-door and 4-door Jeep Wrangler models, including popular trims such as Rubicon, Sahara, Sport, Sport S, and Unlimited variants from 2007 through 2018.

What's Included:

• Front and rear progressive rate coil springs
• Upper and lower adjustable control arms
• Heavy-duty front and rear adjustable track bars
• Extended sway bar end links
• Bump stop spacers
• All necessary mounting hardware

Ideal For:

This suspension system is ideal for Jeep owners who want to enhance their vehicle’s off-road capability without sacrificing daily driving comfort. It suits enthusiasts who run larger tires up to 37 inches and require increased ground clearance and suspension travel for rock crawling, trail riding, or rugged terrain navigation. It also appeals to those seeking a durable, low-maintenance suspension upgrade backed by a trusted brand and warranty.

Rancho is a performance suspension and shock brand for trucks, SUVs, and Jeeps, offering shocks/struts, steering stabilizers, leveling kits, and lift systems built for trail and daily use. Their products are aimed at improving control and stability on rough terrain while maintaining everyday drivability—ideal for rigs that tow, haul, and still see dirt on the weekends.