KYB 5510001 Suspension Strut - Rear

KYB Gas-a-Just Rear Strut for Expedition and Navigator

The KYB Gas-a-just 5510001 is a rear suspension strut for select Ford Expedition and Lincoln Navigator applications. It uses a monotube design with separate hydraulic and high-pressure gas chambers to deliver responsive damping and consistent ride control.

Gas-a-Just Performance Design

KYB Gas-a-just struts are built around a monotube layout that separates the working chambers for control and comfort. The air-free hydraulic section supports quick response, while the nitrogen gas chamber with a floating piston helps maintain ride quality during normal driving and adds damping support when conditions demand it. This design also avoids fade caused by aeration.

• Monotube rear suspension strut
• Compressed length: 15.63 in.
• Extended length: 21.02 in.
• Stroke length: 5.39 in.
• Lower mount type: E2 (20x60)
• Upper mount type: S1 (12MM)
• Dust cover not included

Fitment Details

• Fits 2022-2024 Ford Expedition, rear, except Electronic Suspension, Sport Suspension, Off Road Suspension and Self Leveling Suspension; Gas-a-just
• Fits 2018-2021 Ford Expedition, rear, except Electronic and Load Leveling Suspension; Gas-a-just
• Fits 2018-2020 Lincoln Navigator, rear, except Electronic and Load Leveling Suspension; Gas-a-just
• Fits 2014-2017 Ford Expedition, rear, except Electronic and Load Leveling Suspension; Gas-a-just
• Fits 2014-2017 Lincoln Navigator, rear, except Electronic and Load Leveling Suspension; Gas-a-just
• Fits 2007-2013 Ford Expedition, rear, except Air Suspension; Gas-a-just
• Fits 2007-2013 Lincoln Navigator, rear, except Self Leveling Suspension; Gas-a-just

Common Replacement Uses

• Rear ride control that feels loose or underdamped
• Excessive bouncing after bumps or dips
• Reduced stability during braking or lane changes
• Uneven rear suspension response on Expedition or Navigator models
• Replacement for worn OE-style rear strut assemblies

Installation Notes

Verify rear suspension type before ordering, since this KYB 5510001 does not fit vehicles with electronic, load leveling, self-leveling, sport, off-road, or air suspension where excluded in the fitment notes. Confirm the upper and lower mount types, compressed length, extended length, and stroke length against the original part before installation. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Quality Assurance

KYB is known for suspension components used in OE-style replacement and performance applications. The Gas-a-just line focuses on consistent damping response and resistance to fade, making the 5510001 a technical replacement choice for rear suspension service on Ford Expedition and Lincoln Navigator models.