Rancho RS5000X Rear Shock

2011–2023 Dodge Durango / 2011–2022 Jeep Grand Cherokee

RS55399

Overview:

The Rancho RS5000X Rear Shock is engineered to enhance the ride quality and handling of your Dodge Durango or Jeep Grand Cherokee. Designed for drivers who demand superior performance both on and off the road, this shock absorber features a unique valving system and advanced compression technology that deliver improved vehicle control and smoother suspension response. Whether navigating rugged terrain or cruising city streets, the RS5000X provides consistent, reliable damping for a confident driving experience.

Built to withstand harsh conditions and temperature extremes, the RS5000X is an ideal upgrade for enthusiasts seeking durability and enhanced suspension performance without sacrificing comfort.

Key Features:

Rancho’s RS5000X shocks incorporate advanced technology tailored to each vehicle application, ensuring optimal performance and longevity. Key features include:

• Exclusive Valving System: Cross Tuned technology with a rebound valving system and advanced compression phase improves handling and ride quality on and off road.
• Compression Control Valve: Custom-tuned to regulate fluid transfer, absorbing impacts smoothly while maintaining shock motion control.
• Progressive Engagement Valving: Reduces initial impacts at low speeds to minimize rough ride sensations.
• Durable Construction: 16mm nitro-carburized piston rod resists corrosion and scuffs for extended service life.
• Temperature Resilience: Large twin-tube body filled with all-weather fluid operates effectively in temperatures from -40°F to 248°F.
• Low-Friction Seals: Self-lubricating seals retain gas and oil for quicker rebound and smoother compression.
• Polyurethane Rebound Bumper and Rubber Bushings: Absorb ride harshness for enhanced comfort.
• Nitrogen Gas Pressurization: Pressurized to 150 PSI to reduce damping fade and foaming.
• Protective Boot: Polyvinyl boot guards against debris and environmental damage.
• Limited Lifetime Warranty: Confidence in quality and durability backed by Rancho.

Construction & Design:

The RS5000X rear shock absorber is engineered with premium materials and precision manufacturing techniques. Its 16mm nitro-carburized piston rod offers exceptional resistance to wear and corrosion, ensuring long-lasting performance. The shock features a robust 35mm sintered iron piston that enhances structural integrity and provides consistent damping force. Double-welded loops at stress points increase durability under demanding conditions.

The twin-tube design is filled with specially formulated all-weather fluid that maintains optimal viscosity across a wide temperature range, preventing fade and ensuring smooth operation. A polyvinyl protective boot shields the shock from dirt and debris, extending service life and maintaining performance.

Installation & Fitment:

The Rancho RS5000X Rear Shock is a direct replacement designed specifically for Dodge Durango models from 2011 through 2023 and Jeep Grand Cherokee models from 2011 through 2022. Installation requires no modifications, fitting seamlessly with factory mounting points for a straightforward upgrade. This ensures a hassle-free installation process whether performed by a professional or an experienced DIY enthusiast.

What's Included:

• One Rancho RS5000X Rear Shock Absorber (Part # RS55399)
• Protective Polyvinyl Boot
• Installation Hardware (if applicable)
• Limited Lifetime Warranty Documentation

Ideal For:

The RS5000X rear shock is ideal for Dodge Durango and Jeep Grand Cherokee owners seeking enhanced suspension performance without compromising ride comfort. It suits drivers who frequently encounter mixed driving conditions, including highway cruising, city driving, and off-road adventures. This shock absorber is perfect for those wanting to improve vehicle control, reduce harshness, and extend the lifespan of their suspension components.

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.