Dorman 540-077 Suspension Ball Joint - Front Lower

Dorman 540-077 Front Lower Ball Joint

Dorman 540-077 is a threaded, bolt-in suspension ball joint built for front lower applications on select Chevrolet, Pontiac, Oldsmobile, Buick, and Cadillac vehicles. It is precision-engineered and tested as a direct replacement for the original equipment part on the listed applications, including Chevrolet Cavalier, Pontiac Grand Am, and Oldsmobile Alero.

Key Features

• Front lower suspension ball joint for select GM platforms
• Threaded design with bolt-in mounting type
• Steel construction with grey finish
• Premium suspension grade type
• Dust boot included for joint protection
• Castle nut included; cotter pin hole provided
• Mounting hardware included
• Wrench size: 12 mm
• Stud type: tapered
• Part number: 540-077

Detailed Description

This Dorman suspension ball joint is engineered for front lower use and built from steel for dependable service in the suspension system. The threaded, bolt-in design supports direct replacement on a wide range of vehicles, including 1982-2005 Chevrolet Cavalier, 2000-2005 Pontiac Grand Am, 1995-2005 Pontiac Sunfire, and 2000-2004 Oldsmobile Alero. The part number 540-077 also cross-references MOOG Chassis Products K6527 for the same application.

With a dust boot, castle nut, cotter pin hole, and mounting hardware included, this ball joint is configured for service on specific front lower suspension assemblies. It is not greaseable and does not use bushings, which keeps the design focused on OE-style replacement for the listed vehicles. Compatible applications also include Chevrolet Malibu, Buick Skylark, Oldsmobile Achieva, Chevrolet Corsica, Pontiac Sunbird, Oldsmobile Cutlass Calais, Pontiac Tempest, Buick Skyhawk, Cadillac Cimarron, Oldsmobile Firenza, Oldsmobile Calais, Pontiac J2000 Sunbird, and Pontiac J2000.

What It Helps Fix

• Front-end looseness or play from a worn lower ball joint
• Clunking or popping noises from the suspension
• Uneven tire wear related to suspension joint wear
• Steering instability on worn front lower suspension components
• Inspection failures caused by excessive ball joint movement

Installation Notes and Tips

Verify vehicle application by year, make, model, and front lower position before installation. This part uses a tapered stud, 12 mm wrench size, and bolt-in mounting with three mounting holes. The dust boot should be inspected during installation to confirm proper seating and protection of the joint. For 1999 Oldsmobile Alero and 1999 Pontiac Grand Am, confirm stamped steel arm application before ordering.

Quality Assurance

Dorman states this suspension ball joint is precision-engineered and rigorously tested to provide a reliable OE-style replacement for the listed vehicles. The premium-grade construction and application-specific design support consistent fitment on compatible front lower suspension assemblies.