Dorman 540-078 Suspension Ball Joint - Front Lower

Dorman 540-078 Front Lower Ball Joint

Dorman 540-078 is a threaded, press-in suspension ball joint built for front lower applications on select Chevrolet Corvette, Saturn Sky, Cadillac XLR, and Pontiac Solstice models. It is precision-engineered and tested as a direct replacement for the original equipment design on the listed vehicles.

Key Features

• Front lower suspension ball joint for select GM applications
• Threaded, press-in design for OE-style service replacement
• Steel construction with grey finish
• Dust boot included to help protect the joint
• Premium suspension grade type
• Mounting hardware included
• Wrench size: 12 mm
• Part number: 540-078

Detailed Description

Dorman 540-078 is a suspension ball joint engineered for front lower use on 2005-2019 Chevrolet Corvette, 2007-2010 Saturn Sky, 2004-2009 Cadillac XLR, and 2006-2009 Pontiac Solstice. The steel body, tapered stud, and press-in mounting style match the service needs of these applications, while the included dust boot helps shield the joint from road contamination. This part cross-references MOOG Chassis Products K6537 for the same application.

For buyers searching for a front lower ball joint for Chevrolet Corvette, Cadillac XLR, Saturn Sky, or Pontiac Solstice, Dorman 540-078 provides a direct-fit replacement option with OE-style dimensions and threaded construction.

What It Helps Address

• Front suspension looseness or play
• Clunking or knocking from the lower control arm area
• Uneven tire wear related to worn ball joint movement
• Steering instability or wandering at the front end
• Inspection failure caused by excessive joint wear

Installation Notes and Tips

Verify vehicle year, make, model, and front lower position before installation. This part uses a press-in mounting type and a tapered stud, so proper suspension service tools are recommended. Confirm the 12 mm wrench size and compare the original joint dimensions, including length, width, and outside diameter, before assembly. Follow the vehicle service procedure for alignment checks after replacement.

Quality Assurance

Dorman states that this suspension ball joint is precision-engineered and rigorously tested for reliable OE replacement performance on the listed vehicles. Part number 540-078 is built to meet the service demands of front lower suspension repair on compatible Chevrolet Corvette, Cadillac XLR, Saturn Sky, and Pontiac Solstice applications.