Dorman B6344RD Suspension Ball Joint - Front Upper

Dorman RD Front Upper Ball Joint B6344RD

Dorman RD B6344RD is a front upper suspension ball joint built for severe-duty service on heavy-use trucks and SUVs. It is engineered for applications where towing, hauling, off-road work, and frequent downtime are not acceptable.

The RD, or Rugged Duty, line is Dorman’s heavy-service chassis range. For vehicles such as Chevrolet Express 2500, GMC Savana 3500, and Chevrolet K3500, this line focuses on stronger construction, corrosion resistance, and service-ready fitment for demanding suspension repair.

Key Features

• Front upper suspension ball joint for specified Chevrolet and GMC applications
• Quenched and tempered steel housing for severe-duty use
• Protective coating for improved corrosion resistance
• Premium grease pre-loaded in the joint where applicable
• Grease boot with molded-in standoffs to help retain lubrication
• Threaded design with taper stud type
• Castle nut, dust boot, cotter pin hole, and mounting hardware included
• Greaseable design with no grease fitting included
• Part number B6344RD for catalog and service lookup

Detailed Description

Dorman RD B6344RD is a threaded front upper ball joint made for severe-duty suspension service. The steel housing uses a quenched and tempered construction with a protective finish, while the included hardware also carries corrosion-resistant coating. This helps support long-term service in work trucks and utility vehicles that see repeated load, vibration, and exposure.

Compatible With 1988-2000 Chevrolet K2500 front upper, 1989-2000 Chevrolet C3500 front upper, 1996-2002 Chevrolet Express 3500 front upper, and other listed Chevrolet and GMC applications, this ball joint is a direct replacement for failed original equipment on specified vehicles. Part number B6344RD also cross-references MOOG Chassis Products K6344 for the same application.

Common Repair Symptoms

• Front-end looseness or play at the upper suspension joint
• Clunking or popping noises from the front suspension
• Uneven tire wear caused by worn steering and suspension geometry
• Steering wander or reduced road feel on heavy-duty vehicles
• Service failure on Chevrolet Express 2500, GMC Savana 2500, and similar front upper applications

Installation Notes and Tips

Verify the vehicle’s front upper position and suspension configuration before installation. This part uses a bolt-on mounting type with four mounting holes, a 12 mm wrench size, and a tapered stud. The dust boot is included, and the cotter pin hole is provided for secure fastening where required. Confirm fitment against the vehicle’s GVW and suspension notes, especially on Chevrolet C2500, Chevrolet K2500, GMC C2500, and GMC K2500 applications.

Quality Assurance

Dorman RD chassis parts are built for severe-duty service and are intended for vehicles that need dependable suspension performance under demanding conditions. The RD line emphasizes durable materials, corrosion-resistant finishes, and service-focused construction for long-term use in heavy hauling, towing, and emergency vehicle applications.