Dorman B6445RD Suspension Ball Joint - Front Lower

Dorman RD B6445RD Front Lower Ball Joint

Dorman RD B6445RD is a threaded, press-in front lower suspension ball joint built for severe-duty service. It is a direct replacement for specified Cadillac, Chevrolet, and GMC applications that see towing, hauling, off-road use, and other demanding conditions.

The RD line, or Rugged Duty, is Dorman’s heavy-service chassis range. For vehicles such as the Chevrolet Silverado, GMC Yukon, and Cadillac DTS, this line focuses on corrosion resistance, durable construction, and dependable steering and suspension performance in hard-working environments.

Key Features

• Quenched and tempered steel housing for severe-duty suspension service
• Exclusive protective coating for improved corrosion resistance
• Threaded, press-in design for specified front lower applications
• Greaseable design with pre-loaded premium grease where applicable
• Dust boot included with molded-in standoffs to help retain lubrication
• Castle nut and mounting hardware included with corrosion-resistant coating
• Tapered stud design with cotter pin hole
• Premium suspension grade construction

Detailed Description

Dorman RD B6445RD is engineered for front lower suspension positions on heavy-duty trucks, vans, and SUVs that need consistent steering response under load. It uses a steel ball joint assembly with a polychloroprene dust boot, gray finish, and a 12 mm wrench size. The threaded, press-in mounting style is matched to the listed applications, and the greaseable design supports regular maintenance for long service life. This part cross-references MOOG Chassis Products K6445 for the same application.

Compatible With applications such as 1995-1999 Chevrolet Silverado front lower, 1995-2000 Chevrolet Tahoe front lower, and 1995-1999 GMC Yukon front lower. It also serves heavy-duty platforms including 1988-2000 Chevrolet C2500 front lower and 1988-2000 GMC C3500 front lower. Part number B6445RD is also listed for 2006-2011 Cadillac DTS front lower heavy duty model and 1996-2002 Chevrolet Express 3500 front lower.

What It Helps Address

• Front-end looseness or play in the lower suspension
• Clunking or popping from worn ball joint components
• Uneven tire wear related to suspension wear
• Steering instability on loaded or high-mileage vehicles
• Corrosion-related failure in severe-duty environments

Installation Notes and Tips

Verify the vehicle’s exact year, make, model, and front lower suspension configuration before installation. This part uses a press-in mounting type and a threaded stud with a tapered design, so proper suspension service tools are required. Confirm the cotter pin hole, castle nut, and hardware match the application before assembly. For best results, follow the vehicle service procedure and lubrication schedule for greaseable suspension components.

Quality Assurance

Dorman RD chassis parts are built for severe-duty service with steel construction, corrosion-resistant coatings, and application-specific engineering for specified vehicles. B6445RD is designed for demanding use on trucks, vans, and SUVs where suspension reliability matters.