Rancho RS55046 Shock Absorber - Rear

Rancho RS5000X Rear Shock for Super Duty

The Rancho RS5000X RS55046 is a rear suspension shock absorber for select 2005-2016 Ford F-250 Super Duty and Ford F-350 Super Duty applications. It uses Rancho’s RS5000X valving approach with advanced compression control to improve on-road stability and off-road damping response.

For Ford F-250 Super Duty and Ford F-350 Super Duty rear suspension service, RS55046 provides a direct-fit shock option for 0-inch raised height applications. The RS5000X line focuses on controlled ride quality, consistent damping, and predictable handling across mixed driving conditions.

Key Features

• Part number: RS55046
• Rancho RS5000X shock absorber for rear suspension
• Exclusive valving system with advanced compression functionality
• Extended length: 27.17 in.
• Compressed length: 16.39 in.
• Travel length: 10.78 in.
• Dust shield included
• Extended bumper stop included
• Upper mount: loop bushing mount with 5/8 in. bushing ID and 1.5/16 in. bushing OAL
• Lower mount: loop bushing and sleeve mount with 12 mm sleeve ID and 1.1/2 in. sleeve OAL

Product Details

Rancho RS5000X shocks are built for drivers who want more controlled rear suspension response without changing the vehicle’s basic setup. This RS55046 shock absorber uses a reserve tube diameter of 2.252 in. and a rear-specific fitment profile for 2005-2016 Ford F-250 Super Duty and Ford F-350 Super Duty models. It also fits 2005-2016 Ford F-350 Super Duty with dual rear wheels (DRW) and 0-inch rear raised height. This part cross-references Monroe Shocks & Struts 34770 for the same application.

Common Issues This Shock Can Address

• Excessive rear bounce over uneven pavement
• Loose or unsettled rear-end handling
• Reduced damping control on rough roads
• Harsh response from worn rear shock absorbers
• Inconsistent ride quality under load or towing conditions

Installation Notes and Tips

Verify rear suspension configuration before ordering, including raised height and DRW status where applicable. Confirm upper and lower mount styles against the existing shock before installation. Inspect surrounding bushings, sleeves, and mounting points for wear, and replace damaged hardware components as needed during service.

Quality Assurance

Rancho RS5000X shocks are engineered around a specialized valving design and compression control strategy to support consistent damping performance in daily driving and off-road use. RS55046 is built as a suspension shock absorber for the listed Ford Super Duty rear applications.