KYB 554360 Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for Ram 3500

The KYB Gas-a-Just shock absorber, part number 554360, is a monotube rear shock built for Ram 3500 applications that need firmer control and consistent damping. It is designed for 2003-2018 Dodge Ram 3500 and Ram 3500 rear fitments, including trucks used for towing, hauling, and larger wheel and tire setups.

Gas-a-Just Product Line

KYB Gas-a-Just shocks use a monotube design with separate gas and oil chambers for quick response and stable performance. The line is engineered to add damping over OE-style twin-tube shocks while maintaining a controlled ride during normal driving.

Key Features

• Adds up to 25% more damping performance over original equipment shocks
• Monotube construction separates gas and oil for fade-resistant operation and immediate response
• High-pressure nitrogen gas helps improve steering response and suspension control
• Triple chrome plated piston rod helps reduce seal wear from fluid leakage
• Designed specifically for Dodge Ram trucks, including heavy-duty rear applications
• Dust cover included
• Compressed length: 17.28 in; extended length: 27.44 in; stroke length: 10.16 in
• Upper and lower mount type: E2 (14.6 x 42)

Detailed Description

KYB 554360 is a rear suspension shock absorber engineered for Ram 3500 trucks that need more control than a standard twin-tube design can provide. The monotube layout uses an air-free hydraulic working area for responsiveness and a separate high-pressure nitrogen chamber to maintain consistent damping under load. That design helps the shock react quickly when road conditions change, which is important on Dodge Ram 3500 and Ram 3500 rear suspension setups that see work-duty use.

This part cross-references Monroe Shocks & Struts 911222 for the same application. KYB 554360 is also listed as an interchange with Chrysler 52110144AE and 52113675AE.

What It Helps Address

• Excessive rear-end bounce on rough roads
• Reduced control when towing or carrying heavy loads
• Shock fade from heat and aeration during repeated suspension movement
• Slow steering response caused by worn rear dampers
• Ride instability from larger, heavier tires and wheels

Installation Notes and Tips

Fits 2003-2010 Dodge Ram 3500, rear; fits 2011-2012 Ram 3500, rear; fits 2013-2018 Ram 3500, rear, monotube performance upgrade, without rear air springs. Verify mount style and suspension configuration before installation. The listed compressed length, extended length, and stroke length should be checked against the vehicle’s rear suspension travel to confirm proper application.

Quality Assurance

KYB designs Gas-a-Just shocks for direct suspension control and consistent damping performance in demanding truck applications. The monotube construction, high-pressure gas charge, and chrome piston rod are used to support long-term sealing performance and stable operation in rear suspension service.