Smooth out the ride and regain control on and off the pavement with the Rancho RS5000X shock absorber RS55126, a rear-position damper that drops in as a direct-fit replacement for the 1999-2004 Ford F-450 Super Duty, the 1999-2004 Ford F-550 Super Duty, and the 1983-2011 Ford Ranger — see the Buyer's Guide tab for engine-level fitment. At its heart is Rancho's exclusive Cross Tuned technology, pairing a rebound valving system with an advanced compression phase to improve overall handling and performance.
- Progressive Engagement Valving: custom-tuned for each vehicle to help reduce initial impacts at low speeds and minimize a rough ride.
- Strong and durable: 16 mm nitro-carburized piston rod resists scuffs and corrosion, with double-welded loops at stress areas, a 35 mm sintered-iron piston, and a polyvinyl protective boot.
- Twin-tube design: large 2¼ in twin-tube body filled with all-weather fluid for cooler operation and control across internal temperatures of -40 to 248°F.
- Reduces fade: nitrogen gas pressurized to 150 PSI to minimize air-to-oil mixing, which helps reduce damping fade and foaming.
A low-friction self-lubricating seal retains gas and oil for quicker rebound and smoother compression. Sold individually; for balanced ride control, replace both sides on the axle together. Backed by Rancho's Limited Lifetime Warranty.
Interchange: 813032 · 37014 · RS5126
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
Does this Rancho shock absorber fit my Ford Ranger?
It is a direct-fit rear-position replacement for the 1983-2011 Ford Ranger. Check the Buyer's Guide tab to confirm engine-level fitment for your specific vehicle.
Is this a front or rear shock?
The catalog lists this RS55126 as a rear-position shock absorber for the covered applications.
Is the shock sold individually or as a pair?
It is sold individually. For balanced ride control, it is best practice to replace both sides on the same axle together.
What is the RS5000X Cross Tuned technology?
It combines Rancho's exclusive rebound valving system with an advanced compression phase, designed to improve overall handling and performance both on and off road.
Why is this shock nitrogen gas pressurized?
It is pressurized to 150 PSI to minimize air-to-oil mixing, which helps reduce damping performance fade and foaming during use.
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