Monroe 66405 Suspension Shock Absorber - Rear

Monroe Magnum Shock Absorber 66405 Overview

The Monroe Magnum Shock Absorber 66405 is engineered to provide reliable suspension performance for vehicles requiring precise damping control. Designed with durable metal dust shields and specific mounting types, this shock absorber supports consistent ride quality and handling.

• Compressed length: 11.875 inches
• Travel length: 7 inches
• Extended length: 18.875 inches
• Metal dust shield for enhanced protection
• Lower mount: Stem mount with 3.5/16" stem length and 5/8"-11 thread pitch
• Upper mount: Loop bushing and sleeve mount with 3/4" sleeve ID and 2.3/4" sleeve OAL
• No compressed or extended bumper stops

Magnum Shock Absorber Product Line Details

The Monroe Magnum Shock Absorber line focuses on delivering durable and consistent suspension components designed for a variety of vehicle applications. The Magnum Shock Absorber 66405 is part of this line, offering a balance of travel length and robust construction, including a metal dust shield to protect internal components from debris and extend service life.

Technical Description and Features

This suspension shock absorber features a compressed length of 11.875 inches and an extended length of 18.875 inches, providing a travel length of 7 inches. The metal dust shield helps prevent contamination and wear, ensuring smoother operation over time. The lower mounting uses a stem mount with a 3.5/16" stem length and 5/8"-11 thread pitch, while the upper mounting employs a loop bushing and sleeve mount with a 3/4" sleeve inner diameter and 2.3/4" overall length. The absence of bumper stops and extended hydraulic lockout indicates a design focused on standard damping without additional travel restrictions.

Common Applications and Problem Solving

• Restores vehicle stability and control on uneven road surfaces
• Reduces excessive suspension bounce and body roll
• Improves ride comfort by absorbing shocks from road irregularities
• Prevents premature wear of suspension components due to debris
• Maintains proper suspension travel for consistent handling

Installation Notes and Tips

Ensure compatibility with your vehicle’s suspension system by verifying mounting types and dimensions before installation. The stem mount lower connection requires a 3.5/16" stem length with 5/8"-11 thread pitch, and the upper mount requires a loop bushing and sleeve with specified dimensions. Proper alignment during installation is critical to avoid premature wear or damage. Use appropriate tools to secure mounts without over-tightening.

Quality Assurance and Warranty

Monroe manufactures the Magnum Shock Absorber 66405 to meet industry standards for durability and performance. The metal dust shield enhances longevity by protecting internal components. While specific warranty details are not provided, Monroe products typically come with manufacturer-backed quality assurance to support reliable operation.