Monroe 58510 Shock Absorber and Coil Spring Assembly - Rear

Overview of Monroe Load Adjusting Shock Absorber 58510

The Monroe Load Adjusting Shock Absorber part number 58510 is designed to provide reliable suspension performance for select Buick, Cadillac, Chevrolet, Ford, Lincoln, and Mercury vehicles. This suspension shock absorber and coil spring assembly is engineered to maintain vehicle stability and comfort under varying load conditions.

• Compressed length: 12.75 inches
• Extended length: 21.375 inches
• Travel length: 8.625 inches
• Includes metal dust shield for enhanced durability
• Upper mounting: Stem mount with 2.3/8" stem length and 3/8"-16 thread pitch
• Lower mounting type: L1/cp3
• Parts pack included: P00577, p01134

Monroe Load Adjusting Shock Absorber Product Line

The Load Adjusting Shock Absorber line by Monroe is designed to adapt to changing vehicle loads, providing consistent ride quality and handling. This product line integrates a coil spring assembly with the shock absorber to optimize suspension response, making it suitable for vehicles that experience variable weight conditions. The 58510 model is part of this line, offering precise fitment and reliable performance for specific classic and luxury models.

Detailed Product Description

The Monroe 58510 shock absorber and coil spring assembly features a compressed length of 12.75 inches and an extended length of 21.375 inches, allowing for a travel length of 8.625 inches. This range supports effective suspension movement and load management. The metal dust shield protects internal components from debris and corrosion, extending the service life of the shock absorber. The upper mounting uses a stem mount with a 2.3/8" stem length and 3/8"-16 thread pitch, while the lower mounting employs the L1/cp3 type, ensuring secure installation and compatibility with designated vehicle models.

Compatible Vehicles and Applications

• Buick LeSabre and Electra models
• Cadillac Eldorado and Fleetwood
• Chevrolet Bel Air and Colony Park
• Ford LTD and Thunderbird
• Lincoln Continental and Mark series
• Mercury Grand Marquis and Marauder

This shock absorber assembly is intended for use in suspension systems requiring load-adaptive damping and spring support, particularly in full-size and luxury vehicles from the 1960s through the 1990s.

Common Suspension Issues Addressed

• Reduced ride comfort under heavy load conditions
• Excessive body roll or sway during cornering
• Uneven tire wear due to poor suspension response
• Decreased vehicle stability on rough or uneven roads
• Noise or vibration caused by worn shock absorbers or springs

Installation Notes and Tips

Ensure the vehicle is securely lifted and supported before beginning installation. Verify that the upper and lower mounting points correspond to the L1/cp3 lower mount and S4 stem mount specifications. Use the included parts pack (P00577, p01134) for proper assembly and hardware replacement. It is recommended to replace shock absorbers in pairs to maintain balanced suspension performance. After installation, check for proper travel and clearance to avoid interference with other suspension components.

Quality Assurance and Warranty

Monroe Load Adjusting Shock Absorbers are manufactured to meet or exceed OEM specifications for fit, form, and function. The metal dust shield enhances durability by protecting internal components from contaminants. While specific warranty details for part number 58510 should be confirmed with the manufacturer or distributor, Monroe typically offers limited warranties covering defects in materials and workmanship.