KYB KG5401 Shock Absorber - Front or Rear

KYB Gas-a-just Shock Absorber KG5401

The KYB Gas-a-just KG5401 is a monotube suspension shock absorber built for trucks and older utility vehicles that need firmer control and consistent damping. It uses separate gas and oil chambers for quick response, reduced fade, and stable ride quality under load.

Compatible With select Jeep CJ5, Jeep CJ7, Jeep Scrambler, Jeep Wagoneer, Toyota Land Cruiser, Ford Econoline, and Mitsubishi Van applications, this KYB Gas-a-just shock is engineered for front or rear positions depending on the vehicle listing. The KG5401 is a direct-fit suspension service part for drivers replacing worn shocks on classic 4x4s and vans.

Gas-a-just Line Details

KYB Gas-a-just shocks use a monotube design that separates the gas and hydraulic oil, which helps maintain consistent damping response. The higher gas pressure and monotube construction are suited to vehicles that work, tow, or run larger tires and wheels, including Jeep and Toyota truck platforms.

• Up to 25% more damping performance than original equipment shocks
• Monotube design for fade-resistant operation and fast response
• Valving and components tuned for truck and utility use
• High gas pressure improves steering response
• Triple chrome plated piston rod helps reduce seal wear
• Dust cover included
• Compressed length: 11.57 in; extended length: 18.07 in; stroke length: 6.5 in
• Upper mount type: E1; lower mount type: E1

Detailed Description

The KYB KG5401 is designed for drivers who want more controlled suspension movement than a worn twin-tube shock can provide. Its air-free hydraulic working chamber delivers responsiveness, while the nitrogen gas chamber supports consistent performance during normal driving and sudden load changes. This makes the KG5401 a practical choice for classic Jeep CJ5 and CJ7 front shock replacement, Jeep Wagoneer front or rear service, Toyota Land Cruiser front suspension repair, and rear shock replacement on select Ford Econoline and Mitsubishi Van applications.

This part cross-references Monroe Shocks & Struts (e.g., 34904) for the same application.

What It Helps Address

• Excessive bounce after bumps or dips
• Reduced steering response from worn shocks
• Shock fade during repeated suspension movement
• Unstable ride quality on trucks with heavier tires and wheels
• Loss of control from aging suspension damping

Installation Notes and Tips

• Verify the vehicle position before ordering; this part is listed for front and rear applications depending on the vehicle.
• Match the E1 upper and lower mount types to the original suspension setup.
• Check compressed and extended length against the existing shock to confirm proper travel.
• Inspect related suspension components such as bushings, springs, and mounts during replacement.
• Use the vehicle-specific fitment notes for classic Jeep, Toyota, Ford, and Mitsubishi applications.

Quality Assurance

KYB is known for OE-level suspension engineering, and the Gas-a-just line is built with monotube construction, high-pressure gas, and a triple chrome plated piston rod for durable service. Part number KG5401 is manufactured to support consistent damping performance across the listed fitments.