Rancho RS5000X Rear Shock Absorber for 1991-2005 Ford Explorer, Mazda Navajo & Mercury Mountaineer (RS55185)

Fits select 1991-2005 Ford Explorer (including Sport and Sport Trac), Mazda Navajo, and Mercury Mountaineer. The Rancho RS5000X Rear Shock Absorber (RS55185) is engineered to deliver improved handling and control for SUVs and light trucks, both on and off-road.

At the core of the RS5000X is Rancho's Cross Tuned technology, featuring a unique valving system that manages both rebound and compression phases. This is further enhanced by Progressive Engagement Valving (PEV), which reduces initial impact at low speeds to minimize ride harshness. To prevent damping fade and oil foaming during heavy use, the twin-tube body is nitrogen-gas pressurized to 150 PSI.

• Strong Construction: Features a 16mm nitro-carburized piston rod for superior corrosion resistance and double-welded loops at critical stress points.
• Advanced Internals: Equipped with a 35mm sintered iron piston and a self-lubricating, low-friction seal to maintain gas and oil retention.
• Temperature Resilience: Filled with all-weather fluid capable of withstanding internal operating temperatures from -40 to 248°F.
• Ride Quality: Includes polyurethane rebound bumpers and rubber bushings to absorb road vibrations, protected by a polyvinyl boot.
• Specifications: Gas pressurized to 150 PSI; 35mm piston; 16mm rod; Manufacturer Part Number: RS55185.