Monroe 58591 Shock Absorber and Coil Spring Assembly - Rear

Monroe Load Adjusting Shock Absorber 58591

Monroe 58591 is a rear load adjusting shock absorber for light trucks that carry changing cargo loads or tow regularly. It uses a heavy-gauge calibrated spring to add control as road conditions and vehicle weight demand more from the suspension.

Key Features

• Load adjusting shock absorber for rear suspension applications
• Heavy-gauge calibrated spring helps respond to changing load and road conditions
• Compressed length: 14.875 in.; extended length: 24.75 in.; travel length: 9.875 in.
• 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 12 mm sleeve ID and 1.1/2 in. sleeve OAL
• Metal dust shield included for added protection
• Monroe 58591 is built for rear suspension service on Ford F-150 and Ford F-250 trucks

Product Details

This Monroe Load Adjusting Shock Absorber line is built for trucks that see variable payloads, helping maintain more consistent rear suspension control as cargo weight changes. For 1980-1989 Ford F-150 rear and 1980-1991 Ford F-250 rear applications, Monroe 58591 combines shock damping with a calibrated spring assembly to manage added load without changing the basic mounting layout. This part cross-references Monroe Shocks & Struts (e.g., 58591) for the same application.

What It Helps Address

• Rear-end sag when hauling cargo
• Excessive bounce after bumps or dips
• Reduced control during towing or loaded driving
• Suspension instability from changing bed weight
• Wear from repeated heavy-duty rear suspension use

Installation Notes

Verify upper and lower mount styles before installation: upper loop bushing mount and lower loop bushing with sleeve mount. Confirm compressed length, extended length, and travel length against the vehicle’s rear suspension geometry before service. This Monroe 58591 rear shock absorber is listed for 1980-1989 Ford F-150 rear and 1980-1991 Ford F-250 rear fitments.

Quality Assurance

Monroe manufactures this load adjusting shock absorber as part of its suspension shock and strut lineup, with construction details that include a metal dust shield and calibrated spring design for load-sensitive rear suspension control.