KYB 555601 Shock Absorber - Rear

Overview of KYB Gas-a-just Suspension Shock Absorber 555601

The KYB Gas-a-just shock absorber 555601 is engineered for reliable suspension performance on Ford Crown Victoria, Lincoln Town Car, and Mercury Grand Marquis models. Designed to restore factory ride quality, this shock absorber offers precise damping control tailored to these vehicles.

• Compressed length: 12.92 inches
• Extended length: 20.09 inches
• Stroke length: 7.17 inches
• Lower mount type: E2 (12.2x67.5)
• Upper mount type: S1
• Includes dust cover for protection
• R-stop feature included for controlled rebound

About the KYB Gas-a-just Product Line

The Gas-a-just line from KYB is designed to provide consistent gas pressure and improved damping performance over traditional shocks. This technology helps maintain vehicle stability and control by reducing fade and improving response. The 555601 shock absorber benefits from this design, making it suitable for the suspension needs of full-size sedans like the Ford Crown Victoria, Lincoln Town Car, and Mercury Grand Marquis.

Detailed Product Description

The KYB Gas-a-just 555601 shock absorber features a compressed length of 12.92 inches and an extended length of 20.09 inches, providing a stroke length of 7.17 inches. The lower mount uses an E2 type fitting measuring 12.2 by 67.5 mm, while the upper mount is an S1 type, ensuring proper fitment and secure installation. A dust cover is included to protect the internal components from dirt and debris, extending the service life of the shock. The internal design includes an R-stop feature to control rebound, but it does not have an internal rebound spring or B-stop, which aligns with the original equipment specifications for the compatible vehicles.

Common Suspension Issues Addressed

• Reduced vehicle stability and control during cornering
• Excessive body roll or sway on Ford Crown Victoria, Lincoln Town Car, and Mercury Grand Marquis
• Uneven or harsh ride quality due to worn shocks
• Increased stopping distances caused by poor suspension response
• Noise or vibration from damaged or leaking shock absorbers

Installation Notes and Tips

• Verify compatibility with Ford Crown Victoria, Lincoln Town Car, or Mercury Grand Marquis before installation
• Inspect mounting points for wear or damage prior to installation
• Use proper tools to avoid damage to the E2 lower mount and S1 upper mount fittings
• Replace shocks in pairs to maintain balanced suspension performance
• Ensure dust cover is properly seated to protect the shock absorber

Quality Assurance and Warranty

KYB manufactures the Gas-a-just 555601 shock absorber to meet or exceed OEM specifications for durability and performance. The product includes a dust cover to enhance longevity and is designed specifically for the suspension systems of Ford Crown Victoria, Lincoln Town Car, and Mercury Grand Marquis vehicles. Warranty coverage details should be confirmed with the distributor or retailer at the time of purchase.