Delphi TC4256 Suspension Ball Joint - Front Lower

Delphi TC4256 Front Lower Ball Joint

The Delphi TC4256 is a standard replacement suspension ball joint built for front lower applications on select Hummer H3 and H3T models. It combines a steel body, pre-greased construction, and a rubber dust boot to support consistent steering and suspension movement.

Key Features

• Front lower suspension ball joint assembly
• Fits 2006-2010 Hummer H3, front lower
• Fits 2009-2010 Hummer H3T, front lower
• Steel construction with a rubber dust boot
• Pre-greased and greaseable design with grease fitting included
• Press-in mounting type with threaded, tapered stud
• Counterclockwise (left) thread direction
• Mounting hardware included
• Delphi part number TC4256

Detailed Description

Delphi TC4256 is an OE-style suspension ball joint for front lower service on Hummer H3 and H3T applications. It is built with a plastic bearing type, steel housing, and a tapered threaded stud to match the original suspension geometry. Delphi applies dimensional and material analysis to help maintain OE-to-aftermarket compatibility, and the part is tested for temperature extremes and salt spray exposure to support durability in demanding road conditions. This part cross-references MOOG Chassis Products K500250 for the same application.

Common Issues This Part May 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 wander or imprecise road feel
• Visible boot damage or grease loss at the joint

Installation Notes and Tips

This is a press-in ball joint, so proper removal and installation tools are recommended. Verify the left-hand thread direction, front lower position, and stud taper before installation. Because the joint is pre-greased and greaseable, inspect the grease fitting and boot after installation to confirm proper seating and protection.

Quality Assurance

Delphi uses OE-focused engineering and validation methods for its steering and suspension portfolio. The TC4256 is evaluated through temperature cycling and extended salt spray exposure to help confirm material durability and fit consistency for service on Hummer H3 and H3T front lower suspension applications.