Smooth out the ride and keep body motion in check with the Rancho RS5000X Suspension Shock Absorber RS55047A, a rear-position damper that drops in as a direct-fit replacement for the 2017-2025 Ford F-250 Super Duty and 2017-2025 Ford F-350 Super Duty (see the Buyer's Guide tab for engine-level detail). Built around Rancho's exclusive Cross Tuned technology — a rebound valving system paired with an advanced compression phase — it's designed to improve overall handling and performance on and off road.
Custom-tuned valving: Progressive Engagement Valving is tuned per vehicle to help reduce initial impacts at low speeds and minimize a rough ride, while the Compression Control Valve regulates fluid transfer to help maintain shock motion control.
Strong, durable build: 16mm nitro-carburized piston rod resists scuffs and corrosion, with double-welded loops at stress areas, a 35mm sintered iron piston, and a polyvinyl protective boot.
Temperature-stable damping: a large twin-tube body filled with all-weather fluid runs cooler and withstands internal temperatures from -40 to 248°F; nitrogen charged to 150 PSI helps reduce fade and foaming.
Smooth response: polyurethane rebound bumper, rubber bushings, and a fluon-banded piston help absorb harshness for a smoother ride.
Backed by Rancho's Limited Lifetime Warranty. Sold individually; replace both sides on the rear axle together as a matched pair for balanced ride control.
Frequently Asked Questions
What vehicles does the RS55047A fit?
It is a direct-fit rear shock for the 2017-2025 Ford F-250 Super Duty and 2017-2025 Ford F-350 Super Duty. Check the Buyer's Guide tab to confirm the fit for your specific vehicle.
Is this a front or rear shock?
This is a rear-position suspension shock absorber for the listed applications.
Is the RS55047A sold as a pair or individually?
It is sold individually. For balanced ride control, it's best to replace both sides of the rear axle together as a matched pair.
What is Cross Tuned technology?
It's Rancho's exclusive rebound valving system paired with an advanced compression phase, designed to improve overall handling and performance on and off road.
What are signs my rear shocks may need replacing?
Common signs include excessive bouncing, a rough or harsh ride, poor body control over bumps, or fluid leaking from the shock. Have the suspension inspected to confirm the cause.
Take on rough terrain with the Rancho RS7MT RS77198 Rear Suspension Shock Absorber, an application-tuned monotube shock built for precision on-road and off-road handling. It installs as a direct-fit...
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.
