KYB 555607 Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for Grand Cherokee

The KYB Gas-a-Just 555607 is a monotube rear shock absorber built as an OE-style replacement for the 1999-2004 Jeep Grand Cherokee with Up Country suspension. It is engineered to restore original ride control while adding the firmer response needed for vehicles that work, tow, or run larger tires and wheels.

Gas-a-Just shocks use separate hydraulic and high-pressure gas chambers to deliver responsive damping, consistent control, and fade-resistant operation. For Jeep Grand Cherokee rear suspension service, this KYB shock absorber is designed to support steering response and suspension stability without changing the vehicle’s intended behavior.

Key Features

• Monotube shock absorber design for direct response and consistent damping
• Adds up to 25% more damping performance over original equipment shocks
• High-pressure nitrogen gas separates from the oil for fade-free operation
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Designed specifically for Jeep Grand Cherokee applications
• Supports vehicles with towing loads and heavier tire and wheel setups
• Dust cover included

Product Details

KYB Gas-a-Just 555607 uses an air-free hydraulic piston area for control and a separate gas chamber with a floating piston for quick response. That construction helps the rear suspension react faster to road inputs while maintaining a comfortable ride in normal driving. This part cross-references Monroe Shocks & Struts (e.g., 911523) for the same application.

Fits 1999-2004 Jeep Grand Cherokee, rear. Fits 1999-2004 Jeep Grand Cherokee, rear, recommended OEM replacement with Up Country suspension. The part number 555607 is the correct reference when matching this rear shock absorber to the listed application.

Common Problems This Shock Can Address

• Excessive rear bounce or oscillation after bumps
• Reduced steering response from worn suspension damping
• Shock fade during repeated load or road impact cycles
• Fluid leakage from worn piston rod seals
• Loss of control feel with heavier tires and wheels

Installation Notes

Verify rear fitment by year, model, and suspension configuration before installation. This shock uses E2 lower and upper mount types, with compressed length, extended length, and stroke dimensions listed for application matching. Inspect related suspension components, mounting points, and bushings during replacement to confirm proper operation after installation.

Quality Assurance

KYB designs Gas-a-Just monotube shocks as OE replacement components to help restore factory ride characteristics and suspension control. The 555607 is built for consistent damping performance and long-term service in the specified Jeep Grand Cherokee rear application.