Monroe 550066 Shock Absorber - Rear

Monroe Magnum Light Truck Shock Absorber 550066

The Monroe Magnum Light Truck Shock Absorber 550066 is built for severe-service rear suspension use on Ford Super Duty trucks. It uses gas-charged construction and strengthened components to help maintain ride control in demanding fleet, municipal, and construction environments.

Fits 2017-2026 Ford F-250 Super Duty, rear. Fits 2017-2026 Ford F-350 Super Duty, rear.

Key Features

• Monroe Magnum Light Truck Shock Absorber line for heavy-duty rear suspension applications
• Gas-charged design for consistent damping response
• Strengthened components for added stability in severe-service use
• Larger bore for greater working capacity
• Arc-welded mounts for higher tensile strength
• Dust shield included
• Extended bumper stop included
• Upper loop bushing mount with 5/8" bushing ID and 1.5/16" bushing OAL
• Lower loop bushing and sleeve mount with 9/16" sleeve ID and 1.1/2" sleeve OAL

Product Details

Monroe’s Severe Service Ride Control line is aimed at emergency, municipal fleet, and construction-duty vehicles that see frequent load changes and rough road conditions. Part number 550066 uses a larger reserve tube diameter and extra-durable construction to support rear suspension control on Ford F-250 Super Duty and Ford F-350 Super Duty models. This part cross-references KYB 554388 and Rancho RS55047A for the same application.

Common Issues It Can Address

• Excessive rear bounce after bumps or dips
• Reduced stability when carrying heavy loads
• Harsh, uncontrolled rear suspension movement
• Wear-related loss of damping performance
• Need for a severe-service rear shock on Super Duty trucks

Installation Notes and Tips

Verify rear fitment by year, model, and mounting style before installation. Confirm the upper loop bushing mount and lower loop bushing and sleeve mount match the vehicle’s existing shock configuration. Check compressed length, extended length, and travel length against the suspension’s available space to avoid binding or topping out. Part number 550066 is listed for rear use on 2017-2026 Ford F-250 Super Duty and 2017-2026 Ford F-350 Super Duty.

Quality Assurance

Monroe Severe Service Ride Control shocks are engineered with reinforced construction for demanding commercial and fleet duty. The Magnum Light Truck Shock Absorber 550066 is built to support stable rear ride control in heavy-use applications.