InMotion WT28521 Axle Differential Bearing Race

Axle Differential Bearing Race for Driveline Service

InMotion WT28521 is an axle differential bearing race built for driveline and transmission applications that demand stable rotation and low-friction operation. With a 3.625 in. outside diameter, 0.78 in. width, and a 0.03 in. cup radius, it is sized for precise bearing support in a range of rear axle and transmission setups.

Compatible With Ford F-250 Super Duty, Ford F-350 Super Duty, Chevrolet Silverado 2500 HD, GMC Sierra 2500 HD, Audi R8, and Lamborghini Gallardo applications listed below, WT28521 supports service work where bearing cup wear can affect smooth drivetrain performance.

Key Features

• Part number WT28521 axle differential bearing race
• 3.625 in. cup outside diameter for specified driveline applications
• 0.78 in. width for proper bearing cup seating
• 0.03 in. bearing cup radius for matched fitment
• Built from high-quality materials for consistent rotational support
• Suitable for rear differential and transmission-related service applications

Detailed Product Overview

This bearing race is engineered for applications that require accurate cup geometry and dependable surface support under load. The InMotion WT28521 is used in rear differential assemblies on vehicles such as the 2008-2014 Lamborghini Gallardo with Oerlikon Graziano RDM Differential and the 2008-2011 Audi R8 with Oerlikon Graziano RDM Differential, as well as select Ford, Chevrolet, and GMC transmission and axle configurations. The design focuses on reducing friction, maintaining stability, and supporting smooth drivetrain operation across the listed applications. WT28521 is also a practical service part for older axle setups, including select Ford, Buick, Bentley, Rolls-Royce, and Ferrari applications shown in the fitment data.

This part cross-references no listed interchange numbers in the provided data.

What It Helps Address

• Noise or roughness from a worn differential bearing race
• Excess play caused by damaged bearing cup surfaces
• Reduced rotational smoothness in axle or transmission assemblies
• Heat and friction issues related to bearing surface wear
• Driveline instability in rear differential service applications

Installation Notes and Tips

Verify the vehicle year, make, model, position, and transmission or axle note before installation. This part is listed for rear, rear right, rear left, and N/A positions depending on application, so match the exact configuration shown in the fitment data. Inspect the mating bearing components, axle housing, and race seat for wear or scoring before assembly. Proper bearing installation tools and correct press technique are important to avoid damaging the race or altering bearing preload.

Quality Assurance

InMotion manufactures this bearing race from high-quality materials for use in automotive and industrial environments where consistent performance matters. The part is specified with measured dimensions for width, cup radius, and outside diameter to support accurate replacement selection for the listed applications.

Fitment

• Fits 2008-2014 Lamborghini Gallardo, rear, with Oerlikon Graziano RDM Differential
• Fits 2008-2011 Audi R8, rear, with Oerlikon Graziano RDM Differential
• Fits 2001-2010 Ford F-250 Super Duty, N/A, S6-650 TransmissionMfrCode
• Fits 1999 Ford F-250 Super Duty, N/A, S6-650 TransmissionMfrCode
• Fits 2003-2010 Ford F-350 Super Duty, N/A, S6-650 TransmissionMfrCode
• Fits 2003-2006 Chevrolet Silverado 2500 HD, N/A, S6-650 TransmissionMfrCode
• Fits 2004-2006 Chevrolet Silverado 3500, N/A, S6-650 TransmissionMfrCode
• Fits 2004-2006 GMC Sierra 2500 HD, N/A, S6-650 TransmissionMfrCode
• Fits 2004-2006 GMC Sierra 3500, N/A, S6-650 TransmissionMfrCode
• Fits 2001-2003 Chevrolet Silverado 3500, N/A, S6-650/ML6 TransmissionMfrCode
• Fits 2001-2003 GMC Sierra 2500 HD, N/A, S6-650/ML6 TransmissionMfrCode
• Fits 2001-2003 GMC Sierra 3500, N/A, S6-650/ML6 TransmissionMfrCode
• Fits 2001-2002 Chevrolet Silverado 2500 HD, N/A, S6-650/ML6 TransmissionMfrCode
• Fits 1999-2002 Ford F-350 Super Duty, N/A, S5-47 TransmissionMfrCode
• Fits 2000 Ford F-250 Super Duty, N/A, S5-47 TransmissionMfrCode
• Fits 1997-1999 Ford F-250, N/A, with ZF S5-47 Transmission
• Fits 1997 Ford F-250 HD, N/A, S5-47 TransmissionMfrCode
• Fits 1997 Ford F-350, N/A, S5-47 TransmissionMfrCode
• Fits 1988-1996 Ford F-150, N/A, S5-42 TransmissionMfrCode
• Fits 1987-1996 Ford F-250, N/A, S5-42 TransmissionMfrCode
• Fits 1987-1996 Ford F-350, N/A, S5-42 TransmissionMfrCode
• Fits 1987-1991 Ferrari Testarossa, rear right, with Ferrari Axle
• Fits 1988-1989 Ford E-350 Econoline, N/A, S5-42 TransmissionMfrCode
• Fits 1959-1970 Rolls-Royce Phantom, rear right, with Rolls-Royce Axle
• Fits 1959-1965 Bentley Continental, rear right, with Rolls-Royce Axle
• Fits 1959-1962 Buick LeSabre, rear, with GMC Axle
• Fits 1956-1958 Buick Century, rear, with GMC Axle
• Fits 1956-1958 Buick Roadmaster, rear, with GMC Axle
• Fits 1953-1955 Ford F-100, rear left, with Rockwell A150 Axle
• Fits 1953-1955 Ford F-250, rear left, with Rockwell A150 Axle
• Fits 1953-1955 Ford F-350, rear left, with Rockwell A150 Axle