InMotion WTHM803146 Differential Pinion Bearing - Front Inner, Rear Inner or Rear Outer

Differential Pinion Bearing for Driveline Service

InMotion WTHM803146 is a taper-style differential pinion bearing built for driveline applications that demand stable rotation, reduced friction, and consistent support under load. With a 1.625 in. inside diameter and 1.156 in. width, it is a practical service part for a wide range of front inner and rear inner axle setups.

• Taper bearing design for differential pinion support
• 1.625 in. inside diameter for axle-specific service applications
• 1.156 in. width for proper bearing placement and fit
• Universal-use bearing construction for automotive and industrial environments
• Built from high-quality materials for durability and smooth operation
• InMotion part number WTHM803146 for catalog and service matching

Application Details

This bearing is used in differential and axle assemblies where pinion support, rotational stability, and friction control are critical. It is listed across a broad range of vehicles, including Ford F-250 Super Duty and Ford F-350 Super Duty front inner applications with Spicer 60-SF axle setups, as well as Nissan Frontier rear inner applications with Spicer 44 axle configurations. It also appears in Mercedes-Benz G-Class front inner service, including G550, G63 AMG, G65 AMG, G55 AMG, and G500 models with Mercedes-Benz AL 0/3 C-1 axle setups. The part number WTHM803146 is also associated with many Chevrolet, GMC, Dodge, Jeep, INFINITI, Acura, and Ford axle applications.

This part cross-references common differential bearing service references used for the same application.

What It Helps Address

• Excessive friction in the differential pinion area
• Noise or roughness from worn bearing surfaces
• Loss of rotational stability in axle assemblies
• Wear in front inner or rear inner differential support points
• Service needs on vehicles such as Ford F-250 Super Duty, Nissan Frontier, and Mercedes-Benz G550

Installation Notes and Tips

Verify axle type, position, and bearing dimensions before installation. Confirm the application against the vehicle’s differential and axle configuration, since this bearing is used in multiple front inner and rear inner setups. Clean the housing thoroughly, inspect related races and seals, and follow the axle manufacturer’s service procedure for bearing installation and preload settings.

Quality Assurance

InMotion manufactures this bearing with durable materials and an adaptive design intended for consistent operation across automotive and industrial environments. The taper bearing construction supports smooth performance and long service life when installed in the correct axle application.