Delphi TC6390 Suspension Ball Joint - Front Upper

Delphi Suspension Ball Joint TC6390 Overview

The Delphi TC6390 suspension ball joint is engineered for reliable performance in standard suspension systems. Constructed from durable steel and finished in black, this ball joint assembly is designed to maintain precise steering and suspension alignment for various vehicle applications.

• Made from high-strength steel for durability
• Includes grease fitting for easy maintenance
• Equipped with a chloroprene rubber dust boot to protect against contaminants
• Comes with castle nut and cotter pin for secure installation
• Standard suspension grade type suitable for many passenger vehicles

Technical Specifications and Features

The Delphi TC6390 suspension ball joint features a length of 81 mm and a width of 62 mm, with a height of 4.252 inches. The stud thread diameter measures 0.5 inches with a threaded stud type and a stud thread length of 1.063 inches. This ball joint is greaseable, allowing for extended service life through regular lubrication. The dust boot is made from chloroprene rubber (CR), providing effective protection against dirt and moisture. The mounting type is bolt-on, with four mounting holes and included mounting hardware such as nuts and a castle nut. The mounting bolt length is 25 mm (0.984 inches), with a shank diameter of 0.313 inches and a head diameter of 14.5 mm (0.571 inches). The wrench size required for installation is 13 mm.

Applications and Problem Solving

This Delphi suspension ball joint TC6390 is commonly used in suspension systems requiring a standard grade ball joint assembly. It is compatible with various makes and models that specify a 0.5-inch stud thread diameter and bolt-on mounting type. This part addresses several suspension issues, including:

• Excessive play or looseness in the steering linkage
• Uneven tire wear caused by worn ball joints
• Clunking noises during suspension travel
• Reduced steering responsiveness and control
• Protection against dirt and moisture ingress with the included dust boot

Installation Notes and Tips

When installing the Delphi TC6390 ball joint, ensure the grease fitting is accessible for future maintenance. Use the included castle nut and cotter pin to secure the stud properly, preventing loosening during operation. Verify that the mounting bolts are torqued to the vehicle manufacturer’s specifications. The 13 mm wrench size is required for tightening the stud nut. Regular greasing through the fitting will help maintain smooth operation and extend the ball joint’s service life.

Quality Assurance and Warranty

Delphi suspension components are manufactured to meet or exceed OEM standards, ensuring reliable fit and function. The TC6390 ball joint assembly undergoes rigorous quality control to provide consistent performance. While specific warranty details may vary, Delphi typically offers coverage against defects in materials and workmanship. Consult vehicle-specific documentation or Delphi’s warranty policy for exact terms.