KYB KG5438 Shock Absorber - Front or Rear

KYB Gas-a-just Rear Shock Absorber

The KYB Gas-a-just KG5438 is a monotube suspension shock absorber built for trucks and light-duty applications that need firmer control than a standard twin-tube design. It uses separate gas and oil chambers for quick response, consistent damping, and reduced fade during repeated suspension movement.

For rear suspension service on vehicles such as the Nissan Pathfinder, Toyota Pickup, and Toyota T100, this KYB Gas-a-just shock absorber is engineered to add control for towing, hauling, and larger wheel-and-tire setups. The KG5438 part number is also a direct reference point when comparing replacement options for the same application.

Key Features

• Monotube design separates gas and oil for fade-resistant operation and fast response
• Up to 25% more damping performance than original equipment shocks
• Valving and components tuned for truck use
• Higher gas pressure improves steering response and suspension control
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Dust cover included
• Lower mount type: E1; upper mount type: E1
• Compressed length: 13.9 in; extended length: 21.85 in; stroke length: 7.95 in

Product Details

KYB Gas-a-just shocks are part of the Gas-a-just line, a performance-oriented monotube series focused on consistent damping under load. The internal floating piston and high-pressure nitrogen gas chamber help maintain stable operation when the suspension is working harder than stock, while the hydraulic working chamber delivers direct wheel control. This makes the KG5438 a practical rear shock choice for older trucks and utility vehicles that see cargo, towing, or rough-road use. This part cross-references Monroe Shocks & Struts (e.g., 37029) for the same application.

What This Shock Absorber Helps Address

• Excessive rear-end bounce after bumps or dips
• Reduced control when towing or carrying heavier loads
• Soft or delayed suspension response on worn OE shocks
• Fade from repeated compression and rebound cycles
• Steering and body control issues caused by weak rear damping

Installation Notes

• Fits 1987-1995 Nissan Pathfinder, rear
• Fits 1985-1995 Toyota Pickup, rear
• Fits 1990-1995 Toyota Pickup, rear
• Fits 1995 Toyota T100, rear
• Fits 1993 Toyota T100, rear
• Fits 1983-1994 Mitsubishi Mighty Max, rear
• Fits 1987-1993 Dodge Ram 50, rear
• Fits 1983-1986 Dodge Power Ram 50, rear
• Fits 1982-1986 Nissan 720, rear
• Fits 1979-1983 Toyota Pickup, rear
• Fits 1980-1982 Chevrolet LUV, rear
• Fits 1982 Dodge D50, rear
• Fits 1961-1967 Ford Econoline, front

Verify mount style and suspension configuration before installation. Some listed applications note exclusions such as adjustable shock absorber systems or electronic suspension conversions. For front Ford Econoline service, follow the manufacturer’s suspension and coil spring replacement instructions.

Quality Assurance

KYB designs the Gas-a-just line for direct-fit suspension service with consistent damping characteristics and durable piston rod construction. The KG5438 is built to meet the demands of truck and utility vehicle applications where stable ride control matters.