Rancho RS90000XL 1.5″ Lift Shocks for 1963-1972 GMC C2500 2WD Rear Leaf Spring

Description
Rancho RS90000XL 1.5″ Lift Shocks for 1963-1972 GMC C2500 2WD Rear Leaf Spring

Rancho RS90000XL 1.5″ Lift Shocks for 1963-1972 GMC C2500 2WD Rear Leaf Spring

Part Number: RS999120

Summary: The Rancho RS90000XL series provides industry-leading versatility for the GMC C2500, featuring a 9-position manual adjustment knob to fine-tune your ride quality. By allowing users to transition between a soft street ride and a firm setting for towing or hauling, these shocks solve the compromise typically found in fixed-rate dampening. Engineered for vehicles with a 1.5″ rear lift, they deliver customized control and consistent performance for classic leaf-spring configurations.

Features

• MyRide 9-Position Tuning: A manual adjustment knob provides nine levels of damping control to ensure the perfect balance between comfort and stability for any load or terrain.
• Large Diameter Body: A massive 2.75-inch shock body provides increased fluid capacity to ensure cooler operation and reduced fade during heavy-duty use.
• Nitrogen Gas Pressurized: High-pressure gas charging provides a rapid response rate to ensure consistent tire-to-road contact and minimized aeration.
• Heavy-Duty 18mm Nitro-Carburized Rod: A reinforced piston rod provides exceptional structural rigidity to ensure long-term durability against pitting and corrosion.

Technical Specifications

Fitment

• 1963-1972 GMC C2500 2WD (Rear Leaf Spring)
• Note: Configured for vehicles with 1.5″ of rear lift height.

What’s Included

• Includes 4 Shocks
• Mounting Hardware (Internal Bushings)
• Protective Shock Boots

Why Choose This Product?

• Engineering Advantage: Rancho’s MyRide technology allows for a 400% change in damping force, providing a wider range of control than any other adjustable shock in its class.
• Performance Benefit: Drivers gain the ability to instantly stiffen the rear suspension for heavy payloads or soften it for empty-bed cruising, eliminating the harshness of traditional heavy-duty shocks.

Related Products

RS5000X (Rear):

RS5000X Full Kit:

RS7MT (Rear):

RS90000XL (Rear) – Alternative:

Full Kit (Same Series):

Frequently Asked Questions

Can I adjust these shocks while they are installed on the vehicle?
Yes, the 9-position adjustment knob is easily accessible on the shock body, allowing you to change your ride settings without removing any components.

Do these shocks provide the 1.5 inches of lift?
No, these shocks do not create lift. They are specifically valved and dimensioned to work with a vehicle that has already been equipped with 1.5″ lift springs or blocks.

What is the benefit of the large 2.75-inch body?
The larger body increases oil volume, which helps dissipate heat more effectively than standard shocks, preventing performance drop-off during long drives or heavy hauling.