Rancho RS551804 Suspension Strut and Coil Spring Assembly - Front

Rancho RS5000X Loaded Strut for F-150

The Rancho RS551804 is a complete front suspension strut and coil spring assembly for 2009-2013 Ford F-150 models. It restores factory ride height while improving on-road control and off-road response with Rancho Cross Tuned technology.

Built as an all-in-one front strut solution, this assembly simplifies replacement on late-model trucks and SUVs by combining the key suspension components into one unit. The Rancho RS551804 is engineered and ride tested to meet durability requirements for daily driving and demanding terrain.

Key Features

• Complete front strut and coil spring assembly
• Restores factory ride height on 2009-2013 Ford F-150 applications
• Cross Tuned technology for balanced on-road and off-road handling
• Gas charged design for consistent damping response
• Performance-grade suspension component
• Mounting hardware included

Detailed Overview

The Rancho RS551804 is a direct-fit suspension strut and coil spring assembly for the front position on the Ford F-150. It is built for drivers who want a replacement that addresses ride height, steering feel, and suspension control in one service part. The RS551804 part number is commonly searched for front suspension repair on 2009-2013 Ford F-150 trucks, and it is also referenced as RS551804 in catalog listings.

This assembly uses Rancho’s Cross Tuned design to help deliver controlled handling on pavement and improved stability when the truck is used off-road. It is a practical choice for front-end suspension service where the original strut assembly has worn, lost ride quality, or no longer maintains proper stance. This part cross-references Monroe Shocks & Struts (e.g., 153030, 171141) for the same application.

Common Problems This Part Can Address

• Front-end sag or loss of factory ride height
• Excessive bounce, harshness, or reduced damping control
• Worn strut assembly causing unstable steering feel
• Noisy or tired front suspension components
• Uneven ride quality during highway and off-road driving

Installation Notes and Tips

Fits 2009-2013 Ford F-150, front. Verify the vehicle’s front suspension configuration before installation and compare the original assembly dimensions to the RS551804 specifications, including extended length, compressed length, and travel. Because this is a complete strut assembly, it can reduce the number of separate components needed during front suspension replacement.

For best results, inspect related front suspension parts such as mounts, control arm bushings, and alignment settings during installation. A professional alignment is recommended after replacing front struts on a Ford F-150.

Quality Assurance

Rancho engineers and ride tests this RS5000X Loaded strut assembly to strict durability requirements for front suspension use. The RS551804 is designed as a gas-charged performance-grade replacement for late-model truck applications.