Monroe 34821 Shock Absorber - Rear

Monroe Gas-Magnum Shock Absorber 34821

Monroe Gas-Magnum Shock Absorber 34821 is built for rear suspension service on select Ford trucks and vans, with fitment confirmed for Ford F-100 and Ford F-250 applications. It is sized for controlled damping in heavier-duty use, while maintaining a firmer ride response without adding unnecessary harshness.

Key Features

• Monroe Gas-Magnum shock absorber for rear suspension applications
• Compressed length: 14.25 in.; extended length: 22.875 in.; travel length: 8.625 in.
• Metal dust shield included for added protection
• Upper mount: loop bushing mount with 5/8 in. bushing ID and 1.5/16 in. bushing OAL
• Lower mount: loop bushing and sleeve mount with 1/2 in. sleeve ID and 1.1/2 in. sleeve OAL
• Cross-references Monroe Shocks & Struts 172286 for the same application

Product Details

The Monroe Gas-Magnum Shock Absorber line is engineered for midsize and full-size trucks and vans that need steady control under load. Part number 34821 uses a larger fluid capacity than standard 1-in. bore shocks, helping the shock work more efficiently with less effort. For rear suspension service on Ford F-100 and Ford F-250 models, this design supports consistent damping and predictable road feel in demanding driving conditions.

What It Helps Address

• Excessive rear-end bounce after bumps or dips
• Loose or unsettled ride quality in truck suspension
• Reduced damping performance from worn shock absorbers
• Uneven control during load-carrying or towing use
• Noise or wear associated with deteriorated shock components

Installation Notes and Tips

Verify rear fitment by year, model, and mounting style before installation. This shock uses loop-style upper and lower mounts, so confirm sleeve and bushing dimensions against the vehicle’s existing hardware and suspension layout. Check the compressed and extended lengths to ensure proper suspension travel and clearance on the Ford F-100 or Ford F-250 application.

Quality Assurance

Monroe Gas-Magnum Shock Absorber 34821 is part of Monroe’s truck-focused shock line, built for controlled performance in heavier-duty rear suspension applications. Fitment is confirmed for 1966-1969 Ford F-100 rear, 1966-1972 Ford F-250 rear with 4WD, and 1973-1977 Ford F-250 rear.