KYB 554377 Shock Absorber - Rear

KYB Gas-a-just Rear Shock for Grand Cherokee

The KYB Gas-a-just 554377 is a rear suspension shock absorber built for 2005-2010 Jeep Grand Cherokee applications. It uses a monotube design to deliver responsive damping, stable control, and consistent performance for vehicles that work, tow, or run larger wheels and tires.

For Jeep Grand Cherokee owners looking for a direct-fit rear shock, the KYB Gas-a-just 554377 is engineered to improve steering response and maintain ride control under changing road and load conditions.

Key Features

• Monotube shock absorber design for quick response and consistent damping
• Up to 25% more damping performance than original equipment shocks
• Separate gas and oil chambers help reduce fade from aeration
• High-pressure nitrogen gas supports comfort in normal driving and added control on demand
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage risk
• Designed specifically for Jeep Grand Cherokee rear applications
• Supports electronic safety systems by helping the suspension operate as intended
• Part number 554377 for easy identification and ordering

Product Details

KYB Gas-a-just shocks use an air-free hydraulic working area for responsiveness and a high-pressure gas chamber with a floating piston for added control. That construction helps the shock react quickly when road conditions change, while maintaining a comfortable ride during everyday driving. The rear shock absorber design is a strong match for Jeep Grand Cherokee vehicles that see towing, load carrying, or heavier tire and wheel setups. This part number 554377 is also cross-referenced to Monroe Shocks & Struts 911278 for the same application.

Common Problems This Shock Can Address

• Excessive rear bounce after bumps or dips
• Reduced control when towing or carrying cargo
• Soft or inconsistent rear suspension response
• Steering feel that becomes less precise as shocks wear
• Ride fade caused by aeration in worn twin-tube shocks

Installation Notes and Fitment

Fits 2005-2010 Jeep Grand Cherokee, rear. Verify compressed length, extended length, and mount style before installation: compressed length 15.47 in., extended length 24.4 in., stroke length 8.93 in., lower mount E2(12X40), upper mount E2(12X46). Dust cover is included. This rear shock absorber is intended for direct replacement use on the listed Jeep Grand Cherokee applications, and the KYB Gas-a-just 554377 should be matched to the vehicle’s rear suspension configuration before installation.

Quality Assurance

KYB designs the Gas-a-just line as a monotube performance shock family with high-pressure gas separation for fade-resistant operation and consistent damping response. The 554377 is built to support OE-style fitment and performance expectations for the listed Jeep Grand Cherokee rear applications.