KYB KG54319 Shock Absorber - Rear

KYB Gas-a-just Rear Shock for Expedition and Navigator

The KYB Gas-a-just KG54319 is a monotube suspension shock absorber built for rear applications on select Ford and Lincoln SUVs. It is engineered to deliver quicker response, firmer control, and consistent damping for vehicles that work, tow, or run larger wheels and tires.

For 1997-2002 Ford Expedition rear and 1998-2002 Lincoln Navigator rear applications, this Gas-a-just design separates gas and oil to reduce fade and maintain stable performance during repeated suspension movement. The KG54319 is a direct-fit rear shock option for drivers looking for OE-style replacement control with added damping performance.

Key Features

• Monotube shock design with separate gas and oil chambers for fade-resistant operation
• Up to 25% more damping performance than original equipment shocks
• Higher gas pressure for quicker steering response and improved control
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Designed specifically for Ford and Lincoln SUV applications
• Dust cover included
• Lower mount type: E2(12X38); upper mount type: E2(12X38)

Product Details

The KYB Gas-a-just line is a performance-oriented shock absorber series that uses a high-pressure monotube layout instead of a traditional twin-tube design. That construction allows the shock to react quickly to suspension input while maintaining consistent damping under load. On rear suspension setups for the Ford Expedition and Lincoln Navigator, the KG54319 helps maintain body control when the vehicle is carrying weight, towing, or running heavier tire and wheel combinations.

Part number KG54319 measures 13.19 inches compressed, 20.04 inches extended, and 6.85 inches of stroke. It is a rear suspension shock absorber for 1997-2002 Ford Expedition and 1998-2002 Lincoln Navigator models equipped with rear air leveling. This part cross-references Monroe Shocks & Struts 37154 for the same application.

Common Problems This Shock Can Address

• Excessive rear bounce after bumps or dips
• Reduced control during towing or load carrying
• Shock fade from repeated suspension movement
• Delayed response in rear suspension damping
• Wear-related fluid leakage from aging shock seals

Installation Notes and Tips

Compatible With 1997-2002 Ford Expedition, rear, and 1998-2002 Lincoln Navigator, rear, with rear air leveling. Verify mount style, compressed length, and extended length before installation. Inspect surrounding suspension components, air leveling hardware, and mounting points for wear before replacing the shock. Professional installation is recommended when replacing rear suspension components on full-size SUVs.

Quality Assurance

KYB designs the Gas-a-just line with monotube construction, high-pressure nitrogen gas, and valving intended to maintain consistent damping response in demanding SUV use. The KG54319 is built to support stable suspension performance on Ford Expedition and Lincoln Navigator rear applications.