KYB 5640002 Suspension Strut - Front

KYB MonoMax Front Strut for Ford F-150

The KYB MonoMax 5640002 is a heavy-duty suspension strut built for trucks that carry weight, tow, or see rough road use. For 2015-2020 Ford F-150 front applications without the Heavy Duty Payload Package, it adds the control and stability needed for demanding driving.

Key Features

• Large-bore KYB MonoMax monotube design for consistent damping response
• Fits 2015-2020 Ford F-150, front, w/o Heavy Duty Payload Package
• Compressed length: 16.1 in; extended length: 20.87 in; stroke length: 4.77 in
• Lower mount type: E3(88.75x117x13)
• Upper mount type: S1(12MM)
• Zinc-coated steel piston ring for work-focused durability
• Includes an off-road dust boot

Product Details

KYB MonoMax 5640002 is part of the MonoMax line, a KYB truck-focused shock and strut family built around monotube construction for stable performance under load. This front suspension strut is made for Ford F-150 owners who need firmer control during towing, hauling, or off-road driving, while maintaining fade-resistant response as conditions change. This part cross-references Ford OE numbers FL3Z18124B and FL3Z18124K for the same application.

Compatible With 2015-2020 Ford F-150 front suspension service, KYB 5640002 supports direct replacement needs where the vehicle is not equipped with the Heavy Duty Payload Package. The MonoMax line is aimed at trucks that do real work and need predictable handling from a suspension strut built for demanding use.

Common Issues This Part Helps Address

• Excessive front-end bounce over uneven pavement
• Reduced control when towing or hauling heavy loads
• Front suspension fade during extended rough-road driving
• Loose or unsettled steering feel from worn strut damping
• Loss of stability on trucks with a higher center of gravity

Installation Notes and Tips

Verify that your truck is a 2015-2020 Ford F-150 front application without the Heavy Duty Payload Package before ordering KYB 5640002. Compare the mount style and dimensions to the removed part, and inspect related suspension components such as springs, mounts, and hardware condition during service. Professional installation and a wheel alignment after replacement are recommended.

Quality Assurance

KYB is a recognized suspension manufacturer with a strong OE and aftermarket presence. The MonoMax line uses a monotube design and work-ready materials selected for durability in truck applications.