Rancho RS55235 Shock Absorber - Front

Rancho RS5000X Front Shock Absorber

The Rancho RS5000X RS55235 is a front suspension shock absorber built for 1997-2004 Ford truck and SUV applications with 0" lift. It uses Rancho’s RS5000X valving and advanced compression control to improve on-road stability and off-road response in a direct-fit replacement format.

Compatible With 1997-2003 Ford F-150, front; 2004 Ford F-150 Heritage, front; 1997-2002 Ford Expedition, front; 1998-2002 Lincoln Navigator, front; 1997-2001 Ford F-100 Ranger, front; and 1997-1999 Ford F-250, front.

Key Features

• Rancho RS5000X series shock absorber for front suspension service
• Exclusive valving system for controlled damping response
• Advanced compression functionality for improved handling balance
• Extended length: 15 in; compressed length: 10.24 in
• Travel length: 4.76 in for suspension movement control
• Dust shield included for added protection
• Extended bumper stop included; compressed bumper stop not included
• Upper stem mount with 2.5/8 in stem length and 1/2"-13 thread pitch
• Lower cross pin mount, closed-ended, 5/16" hole ID

Product Details

The Rancho RS5000X RS55235 is engineered for front suspension use on Ford F-150, Ford Expedition, Lincoln Navigator, Ford F-100 Ranger, and Ford F-250 applications listed above. The RS5000X line focuses on controlled ride behavior through a unique valving setup and compression tuning, helping the shock respond consistently during everyday driving and uneven road conditions. The 2.251 in reserve tube diameter supports the internal fluid volume needed for damping performance, while the included dust shield helps protect the shaft area from road debris.

This part cross-references Monroe Shocks & Struts (e.g., 34655, 37131) for the same application. Part number RS55235 is also referenced in interchange listings for related front shock applications.

What It Helps Address

• Excessive front-end bounce over rough pavement
• Loose or unsettled steering feel from worn shocks
• Reduced control during braking and weight transfer
• Front suspension instability on stock-height trucks and SUVs
• Uneven damping response from aging OE-style shock absorbers

Installation Notes

Install on vehicles with 0" lift only, as listed in the fitment data. Verify upper stem mount and lower cross pin mount dimensions before installation, and confirm front suspension application on the vehicle. The RS55235 is a direct replacement shock absorber for the specified Ford and Lincoln models, so matching the mounting style and compressed/extended lengths is important for proper fitment.

Quality Assurance

Rancho’s RS5000X line uses a specialized valving design and compression-focused tuning to support consistent damping performance in front suspension service. Part number RS55235 is built for the listed vehicle applications and follows the RS5000X product line specification for controlled ride and handling.