KYB 5550019 Suspension Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for Jeep Wrangler

The KYB Gas-a-just 5550019 is a rear suspension shock absorber for lifted Jeep Wrangler applications. Built around a monotube design, it separates hydraulic response from high-pressure nitrogen gas to deliver consistent control and a ride that stays composed during everyday driving.

Key Features

• Monotube shock absorber design for responsive damping
• Separate hydraulic and nitrogen gas chambers for controlled performance
• Helps resist fade caused by aeration during repeated suspension movement
• Rear position application for lifted Jeep Wrangler and Wrangler JK models
• Dust cover included
• Compressed length: 15.67 in.; extended length: 24.92 in.; stroke length: 9.25 in.
• Lower mount type: E2 (12.8x40); upper mount type: E3 (68.5x95x0)

Product Details

KYB Gas-a-just shocks are engineered for drivers who want firmer control without giving up everyday ride quality. The 5550019 uses a monotube layout with an air-free hydraulic working area for quick response and a separate high-pressure nitrogen chamber with a floating piston to support comfort during normal driving and add damping force when suspension demand increases. This rear shock absorber is a direct match for 2007-2017 Jeep Wrangler rear applications with a 1.5 inch to 3 inch lift, and 2018 Jeep Wrangler JK rear applications with a 1.5 inch to 3 inch lift. The KYB Gas-a-just line is focused on consistent damping behavior for vehicles that see both street use and added suspension travel.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Uses

• Rear suspension control on lifted Jeep Wrangler builds
• Reduction of excessive bounce after bumps and dips
• Improved damping consistency during repeated suspension cycling
• Restoration of rear shock performance on worn suspension systems
• Support for Jeep Wrangler JK rear ride control with 1.5 inch to 3 inch lift

Installation Notes

Verify rear fitment, lift height, and mount style before installation. This shock absorber is specified for rear use on 2007-2017 Jeep Wrangler and 2018 Jeep Wrangler JK models with a 1.5 inch to 3 inch lift. Confirm compressed and extended length against your suspension travel to avoid topping out or bottoming out. Professional installation is recommended when replacing suspension components.

Quality Assurance

KYB is known for suspension components built around OE-style engineering and controlled damping characteristics. The Gas-a-just design uses a monotube construction to maintain performance consistency under changing road and suspension conditions.