Monroe 58510 Shock Absorber and Coil Spring Assembly - Rear

Load Adjusting Rear Shock for Towing

Monroe 58510 is a load adjusting shock absorber for rear suspension applications where vehicle weight changes with towing or hauling. It uses a heavy-gauge calibrated spring to add control as road conditions and load demand increase, making it a practical choice for classic full-size cars and wagons that see extra cargo or trailer weight.

The Monroe Load Adjusting Shock Absorber line is built for vehicles that need added rear support without changing the suspension setup. For applications such as Ford LTD, Mercury Marquis, and Lincoln Continental rear suspension service, this product line helps maintain more consistent ride control when the vehicle is carrying varying loads.

Key Features

• Load adjusting rear shock absorber for towing and hauling applications
• Heavy-gauge calibrated spring responds to changing road and weight conditions
• Compressed length: 12.75 in.
• Extended length: 21.375 in.
• Travel length: 8.625 in.
• Dust shield included; metal construction
• Upper mount: stem mount with 2.3/8 in. stem length x 3/8 in.-16 thread pitch
• Lower mount: L1/CP3

Detailed Description

Monroe 58510 is a rear suspension shock absorber and coil spring assembly built for vehicles that carry changing loads. The calibrated spring adds resistance as demand increases, helping the rear suspension stay more composed during towing, hauling, or when cargo weight shifts. This makes it a direct-fit service part for select rear applications on Ford LTD, Mercury Marquis, Mercury Colony Park, Lincoln Continental, and other listed vehicles.

This part cross-references Gates 43060 and 43140 for the same application. Monroe 58510 is also a relevant search match for owners looking for a rear load adjusting shock absorber for 1967-1978 Ford LTD, 1967-1978 Mercury Marquis, or 1970-1979 Lincoln Continental service.

What It Helps Address

• Rear sag when the vehicle is loaded with cargo or trailer tongue weight
• Reduced rear suspension control during towing
• Excessive bounce after bumps on heavier rear loads
• Uneven ride height caused by changing payload conditions
• Need for a replacement rear shock on listed classic vehicles

Installation Notes and Fitment

Fits 1970-1979 Lincoln Continental, rear. Fits 1967-1978 Ford LTD, rear. Fits 1975-1978 Mercury Grand Marquis, rear. Fits 1967-1978 Mercury Marquis, rear. Fits 1965-1974 Mercury Colony Park, rear. Fits 1967-1971 Ford Thunderbird, rear. Fits 1969-1970 Mercury Marauder, rear. Fits 1965-1966 Mercury Marauder, rear. Fits 1959-1960 Buick LeSabre, rear. Fits 1953-1957 Chevrolet Bel Air, rear. Fits 1953-1954 Cadillac Eldorado, rear.

Verify upper stem and lower mounting style before installation, and confirm compressed and extended length against the original shock dimensions. This Monroe 58510 rear shock is listed for vehicles intended for towing and hauling applications, and one fitment note specifies use on Buick LeSabre vehicles without air suspension.

Quality Assurance

Monroe manufactures this load adjusting shock absorber as part of its suspension replacement lineup for service on listed rear applications. The design uses a calibrated spring and a metal dust shield to support durability in demanding rear suspension use.