KYB 554379 Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for Town & Country and Grand Caravan

The KYB Gas-a-Just 554379 is a monotube suspension shock absorber built for rear applications on select Chrysler Town & Country and Dodge Grand Caravan models. It is designed to restore control and handling while delivering quick response for vehicles that work, tow, or carry larger wheels and tires.

Key Features

• Monotube OEM replacement design for direct suspension service
• High-pressure gas and oil separation for fade-resistant operation
• Air-free hydraulic piston and valve area for responsive damping
• Floating piston design adds comfort in normal driving and performance on demand
• Triple chrome plated piston rod helps reduce seal wear
• Built to support steering response and electronic safety system performance
• Dust cover included

Product Details

KYB Gas-a-Just shocks use a monotube layout with two separate working chambers. The hydraulic side provides control and consistency, while the high-pressure nitrogen gas chamber reacts quickly when suspension demand increases. That design helps maintain damping performance under load and reduces the fade associated with aeration in conventional twin-tube shocks. Part number 554379 is a rear shock absorber for 2011-2012 Chrysler Town & Country and 2011-2012 Dodge Grand Caravan, plus 2009-2010 Dodge Grand Caravan with sport suspension and without load leveling. This part cross-references Chrysler 68144549AB for the same application.

Common Problems This Shock Can Address

• Excessive rear bounce or oscillation over bumps
• Reduced control during towing or heavier vehicle use
• Soft or delayed steering response from worn rear damping
• Shock fade caused by aeration in aging twin-tube units
• Uneven ride quality after suspension wear

Installation Notes and Tips

Fits 2011-2012 Chrysler Town & Country, rear. Fits 2011-2012 Dodge Grand Caravan, rear. Fits 2009-2010 Dodge Grand Caravan, rear. Verify the vehicle’s suspension configuration before installation, especially load leveling and sport suspension equipment. Confirm compressed length, extended length, and mount style against the original shock before replacement. Professional installation and a post-service alignment check are recommended when suspension components are replaced.

Quality Assurance

KYB engineers the Gas-a-Just line as a monotube replacement option for vehicles that need consistent damping and quick response. The design uses a triple chrome plated piston rod and separated gas/oil chambers to support long-term seal life and stable performance. Part number 554379 is built for the specified Chrysler Town & Country and Dodge Grand Caravan rear applications.