Smooth out the ride and keep the rear of your truck controlled with the Rancho RS5000X Suspension Shock Absorber (RS55254). This is a rear shock that drops in as a direct-fit replacement for the 1999-2016 Ford F-250 Super Duty and 1999-2016 Ford F-350 Super Duty (see the Buyer's Guide tab for the full application details). It's built around Rancho's exclusive Cross Tuned technology — a rebound valving system and advanced compression phase designed to improve overall handling and performance on and off road.
Progressive Engagement Valving: custom-tuned per vehicle to help reduce initial impacts at low speeds for a less rough ride.
Strong and durable: 16mm nitro-carburized piston rod to resist scuffs and corrosion, double-welded loops at stress areas, a 35mm sintered iron piston, and a polyvinyl protective boot.
Handles temperature swings: large twin-tube body filled with all-weather fluid for cooler operation, rated to withstand internal temperatures of -40 to 248°F.
Reduces fade: nitrogen gas pressurized to 150 PSI to minimize air-to-oil mixing, plus a polyurethane rebound bumper, rubber bushings, and a fluon-banded piston for a smoother ride.
Backed by Rancho's Limited Lifetime Warranty. Sold individually — replace both sides of the axle together for balanced ride control.
Frequently Asked Questions
What is the Rancho RS55254 and what does it do?
It's a rear RS5000X twin-tube suspension shock absorber that dampens spring motion to control ride and handling. It uses Rancho's Cross Tuned valving to manage rebound and compression on and off road.
Which vehicles does this shock fit?
It's a direct-fit rear shock for the 1999-2016 Ford F-250 Super Duty and 1999-2016 Ford F-350 Super Duty. Check the Buyer's Guide tab to confirm the fit for your specific truck.
Is this a front or rear shock?
This is a rear-position shock absorber. It installs on the rear axle of the listed Ford Super Duty applications.
Do I need to replace shocks in pairs?
Replacing both sides of an axle together is recommended for balanced, even ride control. This listing is for one shock, so order two for a complete axle set.
What are signs my shock may need replacing?
Common signs include excessive bouncing after bumps, a rougher ride, uneven tire wear, nose dive when braking, or visible fluid leaking from the shock body.
Tame rough pavement and rough trails with the Rancho RS5000X Suspension Shock Absorber RS55254A, a rear shock built around Rancho's exclusive Cross Tuned technology — a rebound valving system and...
WARNING:
These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov.
