KYB 5540026 Suspension Shock Absorber - Rear

KYB Gas-a-just Rear Shock for Ram 3500

The KYB Gas-a-just 5540026 is a rear suspension shock absorber for 2019-2024 Ram 3500 trucks with dual rear wheels, except auxiliary spring applications. It uses a monotube design with separate hydraulic and gas chambers to deliver responsive damping and consistent control for heavy-duty rear suspension service.

Gas-a-just Product Line

KYB Gas-a-just shocks are built for drivers who want firmer response than a conventional twin-tube shock. The monotube layout separates the working hydraulic area from the high-pressure nitrogen gas chamber, helping the shock react quickly to changing road and load conditions while resisting fade from aeration.

Key Features

• Part number 5540026
• Rear suspension shock absorber for Ram 3500
• Compatible with 2019-2024 Ram 3500, rear, w/ dual rear wheels (except auxiliary spring)
• Monotube construction for direct damping response
• Air-free hydraulic piston and valve area for control
• High-pressure nitrogen gas chamber with floating piston
• Dust cover included
• Compressed length: 17.4 in.
• Extended length: 27.32 in.
• Stroke length: 9.92 in.
• Lower mount type: E2 (14.6x42)
• Upper mount type: E2 (14.6x42)

Detailed Description

KYB 5540026 is a rear shock absorber engineered for Ram 3500 applications that require stable damping under load. Its monotube design uses an air-free hydraulic section for immediate response and a separate nitrogen gas section to maintain ride consistency during normal driving and sudden suspension movement. This setup helps the rear suspension stay controlled without the fade associated with aeration in traditional twin-tube shocks. This part cross-references Mopar OE numbers 68191259AB and 68449359AC for the same application.

What It Helps Address

• Excessive rear bounce after bumps or dips
• Reduced control when carrying heavy rear loads
• Shock fade during repeated suspension movement
• Loose or unsettled rear-end feel on rough pavement
• Worn original rear shock performance on Ram 3500 dual rear wheel trucks

Installation Notes

Fits 2019-2024 Ram 3500, rear, with dual rear wheels and without auxiliary spring. Verify mount style and compressed/extended length before installation: lower and upper mounts are E2 (14.6x42), with 17.4 inches compressed length, 27.32 inches extended length, and 9.92 inches of stroke. Confirm the vehicle is equipped for the listed rear shock application before ordering.

Quality Assurance

KYB is a long-established suspension manufacturer known for OE-level shock absorber engineering. The Gas-a-just line uses a monotube design to support consistent damping performance in demanding rear suspension applications.