Delphi TC5401 Suspension Ball Joint - Front Lower

Delphi TC5401 Front Lower Ball Joint

Delphi TC5401 is a front lower suspension ball joint built for OE-style replacement on select Buick, Cadillac, and Oldsmobile applications. It combines a steel body, pressed mounting design, and included dust boot and hardware components for a direct-service suspension repair.

Key Features

• Front lower suspension ball joint for select GM vehicles
• Steel construction with gray finish
• Pressed mounting type for service replacement
• Dust boot made from chloroprene rubber (CR)
• Tapered stud with castle nut, cotter pin, nuts, washers, and mounting hardware included
• Standard replacement grade
• Delphi TC5401 part number for catalog matching

Detailed Description

Delphi TC5401 is engineered as a front lower ball joint for vehicles including the Buick Riviera, Cadillac DeVille, Cadillac Eldorado, Cadillac Seville, Cadillac Allante, Oldsmobile Aurora, Oldsmobile Toronado, and Buick Reatta in the listed model years. Delphi applies OE-focused dimensional and material analysis to help maintain proper fit between the replacement part and the original suspension design. The ball joint assembly uses a tapered stud, pressed mounting style, and a protective dust boot to support steering and suspension articulation at the lower control arm connection. This Delphi TC5401 replacement is a practical choice when servicing worn front suspension joints on GM platforms that require a front lower ball joint.

This part cross-references MOOG Chassis Products K5303 and Mevotech Supreme MK5303 for the same application.

What It Helps Fix

• Front-end clunking or popping from a worn lower ball joint
• Excessive suspension play at the lower control arm connection
• Loose or imprecise steering feel caused by joint wear
• Torn dust boot conditions that expose the joint to contamination
• Uneven tire wear related to suspension looseness

Installation Notes and Tips

Fits 1986-1993 Buick Riviera, Front Lower; 1995-1996 Buick Riviera, Front Lower; 1987-1991 Buick Reatta, Front Lower; 1987-1993 Cadillac Allante, Front Lower; 1986-1996 Cadillac Eldorado, Front Lower; 1995-1996 Cadillac DeVille, Front Lower; 1986-1996 Cadillac Seville, Front Lower; 1995-1996 Oldsmobile Aurora, Front Lower; 1986-1992 Oldsmobile Toronado, Front Lower. Verify the pressed-in mounting style, stud taper, and front lower position before installation. Inspect the control arm and surrounding suspension components for wear, and align the vehicle after replacement if required by the repair procedure.

Quality Assurance

Delphi states that its OE safety technology is used on millions of vehicles worldwide and that its aftermarket steering and suspension parts are validated through extreme temperature testing and extended salt-spray exposure. The brand also uses dimensional and material analysis to support OE-to-aftermarket compatibility.