Monroe 65166 Suspension Shock Absorber - Rear

Monroe Magnum Shock Absorber 65166

The Monroe Magnum Shock Absorber 65166 is a gas-charged, large-bore suspension shock absorber for Class 6-8 trucks. It is built for air spring and taper leaf suspensions, where fast response and steady damping are important under heavy load and high-mileage service.

Key Features

• Gas-charged design for quicker shock response in heavy truck suspension systems
• Large-bore construction for consistent control in severe-duty use
• Extra-large piston bore engineered for high mileage operation
• Metal dust shield included to help protect the shaft area from road debris
• Upper mount: loop bushing and sleeve mount, 3/4" sleeve ID x 1.7/8" sleeve OAL
• Lower mount: loop bushing and sleeve mount, 3/4" sleeve ID x 1.3/4" sleeve OAL
• Compressed length: 15.5625 in; extended length: 25.2031 in; travel length: 9.64 in

Product Details

Monroe Magnum Shock Absorber 65166 is part of the Magnum shock absorber line, which focuses on heavy-duty suspension control for commercial vehicles. The nitrogen gas charge helps the shock react quickly to suspension movement, while the large-bore piston design supports stable damping in demanding service. This makes the 65166 a practical choice for trucks that operate with air spring or taper leaf suspension setups and need consistent ride control over long service intervals.

This part cross-references Monroe Shocks & Struts (e.g., 315389, 47170000464) for the same application.

What It Helps Address

• Excessive bounce after bumps or uneven pavement
• Reduced suspension control under heavy-duty hauling
• Harsh ride behavior from worn shock absorbers
• Unstable handling caused by weak damping response
• Premature wear from severe-duty truck operation

Installation Notes and Tips

Verify compressed length, extended length, and mounting style before installation. The Monroe 65166 uses loop bushing and sleeve mounts at both ends, so the existing suspension hardware and sleeve dimensions should be checked against the vehicle’s current shock configuration. For fitment-based searches, this part is commonly referenced for heavy truck suspension service and Monroe Magnum Shock Absorber 65166 replacement needs.

Quality Assurance

Monroe designs the Magnum line for commercial-duty suspension applications, with a focus on gas-charged response and large-bore damping control. For buyers searching Monroe Magnum Shock Absorber 65166, this part is positioned for heavy truck use where consistent suspension performance matters.