Monroe 34685 Shock Absorber - Rear

Monroe Gas-Magnum Rear Shock Absorber

The Monroe Gas-Magnum Shock Absorber 34685 is built for midsize and full-size trucks and vans that need firm rear suspension control without a harsh ride. For Ford F-250 Super Duty, Ford F-350 Super Duty, and Ford F-350 rear applications, this Monroe Gas-Magnum shock absorber uses higher fluid capacity to manage heat and reduce effort during compression and rebound.

Key Features

• Rear shock absorber for truck and van suspension service
• Gas-Magnum product line tuned for firm control and ride comfort balance
• Up to twice the fluid capacity of standard 1-inch bore shocks
• Metal dust shield included for added protection
• Upper mount: loop bushing mount with 5/8-inch bushing ID and 1.5/16-inch bushing OAL
• Lower mount: loop bushing and sleeve mount with 12 mm sleeve ID and 1.1/2-inch sleeve OAL
• Extended length: 28.25 in; compressed length: 16.5 in; travel length: 11.75 in
• Monroe 34685 shock absorber for rear suspension replacement

Product Details

The Monroe Gas-Magnum line is engineered for heavier-duty truck and van use, where consistent damping matters under load and on rough pavement. This Monroe 34685 rear shock absorber uses increased fluid capacity to help the shock work more efficiently, which supports controlled suspension movement in Ford F-250 Super Duty rear, Ford F-350 Super Duty rear, and Ford F-350 rear applications from 1999 through 2009.

This part cross-references KYB KG54332 and Rancho RS55273 for the same application.

Common Problems This Part Addresses

• Excessive rear bounce after bumps or dips
• Reduced control from worn rear shock damping
• Harsh or unsettled ride in loaded truck applications
• Rear suspension instability during towing or hauling
• Uneven response from aging shock absorber internals

Installation Notes

Compatible With 1999-2009 Ford F-350, rear; 1999-2004 Ford F-250 Super Duty, rear; and 1999-2004 Ford F-350 Super Duty, rear. Verify mount style, sleeve dimensions, and extended/compressed length before installation. Inspect bushings, sleeves, and surrounding suspension components during replacement to confirm proper rear shock fitment on Ford truck applications.

Quality Assurance

Monroe Gas-Magnum shocks are built for truck and van suspension service with a focus on controlled damping and efficient fluid movement. This part is listed with a limited lifetime warranty on the shock absorber.