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

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

Rancho RS9000XL 2.5-4″ Rear Lift Shocks for 1976-1981 Plymouth Trailduster 4WD

Part Number: RS999005

Summary: The Rancho RS9000XL series provides industry-leading adjustability for the rear of your 1976-1981 Plymouth Trailduster 4WD. Featuring a globally recognized 9-position manual tuning knob, these shocks allow owners to instantly transition from a soft street ride to a firm setting for heavy towing or off-road excursions. Engineered specifically for vehicles with 2.5 to 4 inches of rear lift, they provide the necessary travel and damping control to eliminate the harshness often associated with lifted leaf spring suspensions.

Features

• MyRide 9-Position Tuning: A manual adjustment knob provides nine distinct levels of damping force to ensure customized ride control for any terrain or load.
• Nitrogen Gas Pressurized: High-pressure gas charging provides a reduction in aeration and foaming to ensure consistent performance during demanding cycles.
• Large Shock Body: A 2.75-inch diameter reserve tube provides increased fluid capacity to ensure cooler operating temperatures during long-distance hauling.
• Heavy-Duty Piston: A 1.25-inch sintered iron piston provides structural integrity and precision valving to ensure a smooth transition over road irregularities.

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

• Includes 2 Shocks (Pair)
• Protective Red Dust Boots
• Installation Bushings and Washers

Why Choose This Product?

• Engineering Advantage: Rancho’s Tri-Tube design and 9-position valving offer a level of manual customization that standard fixed-rate shocks cannot match.
• Performance Benefit: This shock eliminates the “one size fits all” compromise, allowing the driver to dial in firm control for the trail and plush comfort for the highway.

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

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

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

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

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; simply turn the dial to your desired setting (1 for softest, 9 for firmest).

Will these shocks work with my factory height Trailduster?
No, these shocks are specifically configured for vehicles with 2.5 to 4 inches of rear lift to ensure the piston operates within the correct travel range.

What is the benefit of the nitrogen gas charging?
The gas pressure keeps the internal hydraulic oil under compression, which prevents air bubbles from forming (aeration) and maintains consistent damping performance under heat.