Monroe 58643 Shock Absorber and Coil Spring Assembly - Rear

Overview of Monroe Load Adjusting Shock Absorber 58643

The Monroe Load Adjusting Shock Absorber part number 58643 is engineered for Ford F-150 and Lincoln Mark LT trucks. Designed to maintain vehicle stability and ride comfort under varying load conditions, this suspension shock absorber and coil spring assembly offers precise control and durability.

• Compressed length: 16.59 inches
• Extended length: 27.55 inches
• Travel length: 10.96 inches
• Metal dust shield included for enhanced protection
• Loop bushing and sleeve mounts (upper and lower) with 1/2" sleeve ID
• Compatible with Ford F-150 and Lincoln Mark LT models

Load Adjusting Shock Absorber Product Line Details

The Monroe Load Adjusting Shock Absorber line is designed to adapt to changing load conditions, providing consistent damping performance whether the vehicle is lightly loaded or carrying heavy cargo. This feature helps maintain ride quality and vehicle control, making it suitable for trucks like the Ford F-150 and Lincoln Mark LT that often experience variable payloads.

Technical Description and Features

This suspension shock absorber and coil spring assembly features a compressed length of 16.59 inches and an extended length of 27.55 inches, allowing for a travel length of 10.96 inches. The assembly includes a metal dust shield to protect internal components from debris and extend service life. Both upper and lower mounts use loop bushing and sleeve mounts with a 1/2" sleeve inner diameter, ensuring secure and stable attachment to the vehicle chassis. The absence of bumper stops and hydraulic lockout indicates a design focused on smooth, consistent damping without abrupt travel limits.

Common Applications and Problem Solving

• Improves ride stability when carrying heavy loads in Ford F-150 and Lincoln Mark LT trucks
• Reduces suspension sag and bottoming out under variable payloads
• Minimizes noise and vibration caused by worn or damaged shocks
• Enhances vehicle control and handling on uneven or rough terrain
• Protects suspension components from premature wear due to debris with metal dust shield

Installation Notes and Tips

When installing Monroe Load Adjusting Shock Absorber 58643, ensure the loop bushing and sleeve mounts align correctly with the vehicle’s mounting points. Use appropriate tools to avoid damaging the 1/2" sleeve ID bushings. Verify the shock absorber’s compressed and extended lengths match OEM specifications for the Ford F-150 or Lincoln Mark LT. It is recommended to replace shocks in pairs to maintain balanced suspension performance.

Quality Assurance and Warranty

Monroe shock absorbers are manufactured to meet strict quality standards for durability and performance. While specific warranty details for part number 58643 should be confirmed with the manufacturer or distributor, Monroe typically offers limited warranties covering defects in materials and workmanship. This ensures reliable operation and peace of mind when replacing suspension components on Ford F-150 and Lincoln Mark LT vehicles.