Rancho RS90000XL 0″ Rear Lift Shocks for 1999-2004 Ford F-550

Description
Rancho RS90000XL 0″ Rear Lift Shocks for 1999-2004 Ford F-550

Rancho RS9000XL 0″ Rear Lift Shocks for 1999-2004 Ford F-550

Part Number: RS999126

Summary: The Rancho RS9000XL series provides the ultimate in damping flexibility for the Ford F-550. Featuring a 9-position manual adjustment knob, these shocks allow drivers to instantly tune the ride quality to match specific hauling or towing demands. Whether you are navigating an empty work truck on the highway or managing a maximum payload, this Tier 2 adjustable system solves the compromise between comfort and control.

Features

• 9-Position Tuning: A manual adjustment knob provides nine distinct levels of damping force to ensure the perfect balance between street comfort and heavy-duty towing stability.
• Large Shock Body: A 2.75-inch diameter reserve tube provides increased fluid capacity to ensure cooler operating temperatures during high-demand hauling.
• Nitrogen Gas Charged: High-pressure gas displacement provides immediate response to road irregularities to ensure consistent tire-to-ground contact.
• Protective Boot: A heavy-duty poly-vinyl accordion boot provides a physical barrier for the piston rod to ensure seal longevity in harsh environments.

Technical Specifications

Fitment

• 1999-2004 Ford F-550
• Note: Fits 2WD and 4WD models at stock ride height.

What’s Included

• Includes 2 Shocks
• Protective Dust Boots
• Required Mounting Hardware

Why Choose This Product?

• Engineering Advantage: Rancho’s MyRide technology allows for a 400% change in damping force, bridging the gap between a soft daily driver and a rigid commercial hauler.
• Performance Benefit: Eliminates the “empty bed” bounce while providing the necessary stiffness to prevent sway under heavy rear-axle loads.

Related Products

RS5000X (Rear):
Rancho RS5000X 0" Rear Lift Shocks for 1999-2004 Ford F-550

RS5000X (Front):
Rancho RS5000X 0" Front Lift Shocks for 1999-2004 Ford F-550

RS7MT (Front):
Rancho RS7MT 0" Front Lift Shocks for 1999-2004 Ford F-550

Front Only (Same Series):
Rancho RS90000XL 0" Front Lift Shocks for 1999-2004 Ford F-550

RS5000X (Kit):
Rancho RS5000X 0" Lift Shocks for 1999-2004 Ford F-550

RS90000XL (Kit):
Rancho RS90000XL 0" Lift Shocks for 1999-2004 Ford F-550

Frequently Asked Questions

How do I adjust the firmness of these shocks?
The RS9000XL features a manual knob located at the base of the shock body. You can click through nine settings, with 1 being the softest and 9 being the firmest.

Will these shocks lift my Ford F-550?
No, these shocks are configured for 0-inches of lift and are designed to replace the factory-length dampers at stock height.

What is the benefit of the larger 2.75-inch body?
The increased oil capacity allows the shock to dissipate heat more efficiently, which prevents “shock fade” during long trips with heavy trailers.