Rancho RS90000XL 2.5-4″ Lift Shocks for 1976-1981 Plymouth Trailduster 4WD

Description
Rancho RS90000XL 2.5-4″ Lift Shocks for 1976-1981 Plymouth Trailduster 4WD

Rancho RS90000XL 2.5-4″ Lift Shocks for 1976-1981 Plymouth Trailduster 4WD

Part Number: RS999114

Summary: The Rancho RS90000XL series provides unparalleled versatility for your Plymouth Trailduster through its industry-leading 9-position manual tuning system. By allowing the driver to adjust damping levels across nine distinct settings, this shock solves the compromise between highway comfort and off-road stability. Whether you are navigating rugged terrain or towing heavy loads, these shocks provide the exact level of firm or soft response required for your specific driving environment.

Features

• 9-Position Tuning: A manual adjustment knob provides nine levels of damping control to ensure the ride quality is perfectly matched to the vehicle’s load or terrain.
• Large Shock Body: A 2.75-inch diameter reserve tube provides increased fluid capacity to ensure cooler operating temperatures during heavy-duty use.
• Nitrogen Gas Charged: High-pressure gas optimization provides a reduction in aeration and foaming to ensure consistent performance under aggressive cycling.
• Heavy-Duty Piston: A 1.25-inch sintered iron piston provides structural integrity and increased surface area to ensure precise valving response.

Technical Specifications

Fitment

• 1976-1981 Plymouth Trailduster 4WD
• Note: I.D. of shock bushing is smaller than mounting pin & requires lubrication & extra effort for installation.

What’s Included

• (2) Rancho RS999114 Front Shocks
• (2) Rancho RS999005 Rear Shocks
• Protective Red Dust Boots
• Necessary Bushings and Hardware

Why Choose This Product?

• Engineering Advantage: Rancho’s Tri-Tube design combines a massive fluid reservoir with a 9-way adjustable valve, providing more tuning range than standard monotube alternatives.
• Performance Benefit: Drivers gain the ability to switch from a soft, plush street ride to a firm, controlled off-road setting in seconds without removing the shocks.

Related Products

RS5000X (Rear):
Rancho RS5000X 2.5-4" Rear Lift Shocks for 1976-1981 Plymouth Trailduster 4WD

RS5000X (Front):
Rancho RS5000X 2.5-4" Front Lift Shocks for 1976-1981 Plymouth Trailduster 4WD

RS90000XL (Rear):
Rancho RS90000XL 2.5-4" Rear Lift Shocks for 1976-1981 Plymouth Trailduster 4WD

RS5000X (Kit):
Rancho RS5000X 2.5-4" Lift Shocks for 1976-1981 Plymouth Trailduster 4WD

RS90000XL (Front):
Rancho RS90000XL 2.5-4" Front Lift Shocks for 1976-1981 Plymouth Trailduster 4WD

Frequently Asked Questions

How do I adjust the firmness of these shocks?
The RS9000XL features an external 9-position knob located at the base of the shock body that can be turned by hand to increase or decrease damping resistance.

Are these shocks compatible with my stock height Trailduster?
No, these shocks are specifically configured for vehicles equipped with a 2.5-inch to 4-inch suspension lift.

Why are the bushings difficult to install on the mounting pins?
Per the manufacturer, the bushing inner diameter is designed for a tight interference fit. Using a silicone-based lubricant and a press or vice will ensure a secure and quiet mount.