Timken SP620303 Wheel Bearing and Hub Assembly - Front

Timken SP620303 Wheel Bearing Hub Assembly

Timken SP620303 is a front wheel bearing and hub assembly built for heavy-duty truck applications that demand stable wheel support, low noise, and consistent braking feel. It is engineered for the Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD front axle positions listed below.

Key Features

• OE-developed testing helps control design, materials, and manufacturing process consistency.
• Low runout helps reduce wheel-end noise and vibration while supporting smoother braking performance.
• Premium seals use a reinforced outer case, ribbed rubber inner diameter, contamination exclusion features, and vent holes to support sealing durability.
• Precision-profile bearings with uniform internal geometry and enhanced surface finishes help increase load-carrying capacity and bearing life.
• Integrated ABS sensor is 100% tested to monitor wheel speed for Anti-lock Braking Systems.
• Driven hub design with 36 splines, 4 flange bolt holes, 8 wheel studs, and a 7.087 in. bolt circle diameter.

Detailed Description

Timken SP620303 is a front wheel bearing and hub assembly for 2011-2019 Chevrolet Silverado 3500 HD, 2011-2018 Chevrolet Silverado 2500 HD, 2019 Chevrolet Silverado 2500 HD, 2011-2019 GMC Sierra 3500 HD, 2011-2018 GMC Sierra 2500 HD, and 2019 GMC Sierra 2500 HD applications. The assembly uses precision bearing geometry and controlled surface finishes to support load handling and long service life, while the low-runout design helps maintain stable wheel rotation. Timken SP620303 also includes an ABS sensor that is tested for wheel-speed monitoring, making it a direct-fit service part for front-end repair on these heavy-duty trucks. This part cross-references MOOG Hub Assemblies 515145 and SKF BR930824 for the same application.

What It Helps Address

• Front wheel bearing noise on Silverado 2500 HD, Silverado 3500 HD, Sierra 2500 HD, and Sierra 3500 HD trucks
• Wheel vibration caused by excessive hub runout
• ABS warning concerns related to wheel-speed signal issues
• Uneven braking feel from worn hub bearing components
• Front-end looseness or rough wheel rotation from bearing wear

Installation Notes and Tips

Verify the vehicle’s year, make, model, and front axle configuration before installation. Confirm spline count, bolt circle diameter, flange dimensions, and sensor connection details against the removed part to ensure proper match. Clean the mounting surface thoroughly and inspect adjacent components such as the axle shaft, knuckle, and brake hardware for wear before installing the new hub assembly.

Quality Assurance

Timken uses OE-developed testing and controlled manufacturing processes to support consistent hub bearing performance. The integrated ABS sensor is 100% tested, and the premium seal design is built to help maintain contamination resistance and sealing life in demanding truck service.