KYB 5540022 Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for Ram 2500

The KYB Gas-a-just 5540022 is a rear suspension shock absorber built for Ram 2500 trucks that need firmer control than a standard twin-tube design. It uses a monotube layout with separate gas and oil chambers to deliver quick response, consistent damping, and reduced fade during demanding driving.

Compatible with 2014-2025 Ram 2500 rear applications listed below, this Gas-a-just shock is a direct-fit option for trucks without rear air spring and without heavy duty shocks. The KYB Gas-a-just line is engineered for vehicles that work, tow, and run larger wheels and tires, while still maintaining a controlled ride in everyday use.

Key Features

• Part number 5540022
• Monotube shock design for responsive damping and stable control
• Up to 25% more damping performance than original equipment shocks
• High-pressure nitrogen gas and hydraulic working chambers for fade-resistant operation
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Designed for Ram truck suspension tuning and steering response
• Dust cover included
• Lower mount type: E2(14.6X42)
• Upper mount type: S1(12MM)
• Compressed length: 16.53 in; extended length: 24.56 in; stroke length: 8.03 in

Product Details

KYB Gas-a-just shocks separate the gas and oil into distinct chambers, which helps maintain consistent damping as the suspension cycles. That design supports immediate response when load, road surface, or driving conditions change. For Ram 2500 rear suspension service, 5540022 is a practical upgrade when the truck is used for towing, hauling, or fitted with heavier tires and wheels. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Problems This Shock Can Address

• Excessive rear bounce after bumps or dips
• Reduced control when towing or carrying load
• Soft or delayed suspension response compared with OE damping
• Shock fade during repeated suspension movement
• Seal wear concerns associated with fluid leakage

Installation Notes

• Fits 2020-2025 Ram 2500, rear, w/o Rear Air Spring and w/o Heavy Duty Shocks; Gas-a-just
• Fits 2014-2019 Ram 2500, rear, Monotube Performance Upgrade; w/o Rear Air Spring and w/o Heavy Duty Shocks; Gas-a-just
• Verify rear suspension configuration before ordering, especially air spring and heavy duty shock equipment
• Confirm mount style and dimensions against the existing shock before installation
• Professional installation and a post-repair suspension inspection are recommended

Quality Assurance

KYB manufactures the Gas-a-just line with monotube construction and application-specific valving for Ram trucks. The design supports consistent damping performance and helps keep suspension, braking, and stability systems operating as the vehicle manufacturer intended.