Smooth out rough pavement and trail chatter with the Rancho RS5000X Suspension Shock Absorber RS55145, a front-position shock built around Rancho's exclusive Cross Tuned technology. It installs as a direct-fit replacement for the front of the 1986-1995 Toyota 4Runner, 1986-1995 Toyota Pickup, and 1993-1998 Toyota T100 — see the Buyer's Guide tab for engine-level fitment.
- Cross Tuned technology: pairs an exclusive rebound valving system with an advanced compression phase to help improve overall on- and off-road handling and performance.
- Progressive Engagement Valving: custom-tuned for each vehicle to help reduce initial low-speed impacts and minimize a rough ride.
- Strong and durable: 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.
- Extreme-temperature ready: large twin-tube body filled with all-weather fluid for cooler operation and rated to withstand internal temperatures of -40 to 248°F.
Nitrogen gas pressurized to 150 PSI helps minimize air-to-oil mixing to reduce damping fade and foaming, while a low-friction, self-lubricating seal retains gas and oil for quicker rebound and smoother compression. A polyurethane rebound bumper, rubber bushings, and a fluon-banded piston further smooth ride quality. Backed by Rancho's Limited Lifetime Warranty.
Interchange: RS5145
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
Which vehicles does the Rancho RS55145 fit?
It is a direct-fit front shock for the 1986-1995 Toyota 4Runner, 1986-1995 Toyota Pickup, and 1993-1998 Toyota T100. Check the Buyer's Guide tab to confirm your exact application.
What position on the vehicle does this shock mount?
This RS5000X shock is cataloged for the front position on the listed Toyota applications.
What is Cross Tuned technology?
It is Rancho's exclusive tuning that pairs a rebound valving system with an advanced compression phase, designed to help improve overall handling and performance both on and off road.
Is this a gas-charged shock?
Yes. It is nitrogen gas pressurized to 150 PSI, which helps minimize air-to-oil mixing to reduce damping fade and foaming.
Should I replace shocks in pairs?
This listing is for one shock. Replacing shocks as an axle pair is a common best practice for balanced ride and handling; follow your vehicle service information.
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