Monroe 66403 Suspension Shock Absorber - Rear

Monroe Magnum Shock Absorber 66403 Overview

The Monroe Magnum Shock Absorber 66403 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 vehicle stability.

• Compressed length: 12.875 inches
• Travel length: 8 inches
• Extended length: 20.875 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 suspension components designed for heavy-duty applications and extended service life. The 66403 model incorporates robust construction elements such as a metal dust shield and specific mounting configurations to meet the demands of various vehicle suspensions.

Technical Description and Features

This suspension shock absorber features a compressed length of 12.875 inches and an extended length of 20.875 inches, providing an 8-inch travel length to accommodate suspension movement. The metal dust shield protects internal components from debris and corrosion, enhancing durability. 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" sleeve overall length, ensuring secure attachment and proper fitment.

Common Applications and Problem Solving

• Reduces excessive suspension bounce and improves vehicle control
• Minimizes wear on suspension components caused by dust and debris
• Restores proper ride height and suspension travel
• Addresses noise and vibration issues related to worn shocks
• Enhances stability during braking and cornering maneuvers

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 a 5/8"-11 thread pitch, while the upper mount fits a loop bushing and sleeve with a 3/4" inner diameter. Proper torque specifications should be followed to avoid premature wear or failure.

Quality Assurance and Warranty

Monroe manufactures the Magnum Shock Absorber 66403 to meet industry standards for durability and performance. The metal dust shield adds protection against environmental factors, contributing to the product’s longevity. Warranty details should be confirmed with the manufacturer or authorized distributor.