Rancho RS5000X 2.5-4″ Lift Shocks for 1977-1986 GMC K3500 4WD

Description
Rancho RS5000X 2.5-4″ Lift Shocks for 1977-1986 GMC K3500 4WD

Rancho RS5000X 2.5-4″ Lift Shocks for 1977-1986 GMC K3500 4WD

Part Number: RS55001 / RS55134

Summary: The Rancho RS5000X series is engineered to provide a significant upgrade in ride quality and durability for your GMC K3500. Utilizing a sophisticated twin-tube gas-pressurized design, these shocks are specifically configured for vehicles with a 2.5 to 4-inch lift. By implementing Rancho’s Cross-Tuned technology, this set balances off-road ruggedness with smooth street performance, effectively neutralizing harsh impacts and vibrations common in lifted 4WD applications.

Features

• Cross-Tuned Technology: A unique valve system provides a progressive engagement of the valving to ensure controlled handling during both low-speed crawling and high-speed highway travel.
• Twin-Tube Gas Pressure: The nitrogen-charged 1.375-inch bore provides a consistent damping force to ensure reduced aeration and shock fade during heavy-duty use.
• Protective Boot Included: High-quality red polyvinyl accordion boots protect the piston rod from debris and moisture to ensure long-term seal integrity.
• Nitro-Carburized Piston Rod: Heavy-duty 16mm rods provide increased structural strength and corrosion resistance to ensure reliable performance in harsh environments.

Technical Specifications

Fitment

• 1977-1986 GMC K3500 4WD
• Note: 2 & 4 Door models with Rancho Suspension.

What’s Included

• (2) Front RS5000X Series Shocks
• (2) Rear RS5000X Series Shocks
• Protective Red Dust Boots
• Necessary Installation Bushings and Hardware

Why Choose This Product?

• Engineering Advantage: Rancho’s patented valving system is specifically tuned to the weight and geometry of the K3500 chassis, preventing the “bouncy” feel often associated with lifted leaf-spring trucks.
• Performance Benefit: Drivers will experience a noticeable reduction in harshness over potholes and washboard roads, resulting in less driver fatigue and better tire-to-road contact.

Related Products

RS5000X (Rear):
Rancho RS5000X 2.5-4" Rear Lift Shocks for 1977-1986 GMC K3500 4WD

RS5000X (Front):
Rancho RS5000X 2.5-4" Front Lift Shocks for 1977-1986 GMC K3500 4WD

RS90000XL (Front):
Rancho RS90000XL 2.5-4" Front Lift Shocks for 1977-1986 GMC K3500 4WD

Frequently Asked Questions

Will these shocks lift my GMC K3500?
No, these shocks do not create lift. They are specifically configured for vehicles that already have a 2.5 to 4-inch suspension lift installed.

Is the twin-tube design durable enough for off-road use?
Yes, the twin-tube design is highly durable for off-road applications because the outer tube acts as a shield, allowing the shock to continue functioning even if the outer body is dented by trail debris.

Do these shocks come with the boots shown?
Yes, this full set includes four red polyvinyl boots to protect the internal seals from mud, dust, and grime.