Rear Shock Absorber for 1999-2016 Ford F-250 Super Duty & More - Rancho RS55254

Smooth out the ride and tighten up control with the Rancho RS5000X shock absorber RS55254, a rear-position damper built as a direct-fit replacement for the 1999-2016 Ford F-250 Super Duty and 1999-2016 Ford F-350 Super Duty (see the "Vehicles it fits" section for engine-level fitment). This Rancho shock absorber pairs a large twin-tube body with Rancho's exclusive Cross Tuned technology to improve on- and off-road handling.

• Cross Tuned technology: an exclusive rebound valving system plus an advanced compression phase to improve overall handling and performance on and off road.
• Progressive Engagement Valving: custom-tuned per vehicle to help reduce initial low-speed impacts and minimize a rough ride.
• Strong and durable: a 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.
• Temperature handling: the twin-tube body is filled with all-weather fluid rated to withstand internal temperatures of -40 to 248°F for cooler operation.

Nitrogen gas pressurized to 150 PSI helps minimize air-to-oil mixing to reduce foaming and damping fade, while a self-lubricating seal and fluon-banded piston support quicker rebound and smoother compression. If worn rear shocks are behind your Super Duty's harsh ride, this replaces them. Backed by Rancho's Limited Lifetime Warranty. Sold individually; replace the rear pair together for balanced ride control.