InMotion WTHM88542 Differential Pinion Bearing - Front Outer or Rear Outer

Differential Pinion Bearing for Driveline Service

The InMotion WTHM88542 is a differential pinion bearing built for driveline and axle applications that demand smooth rotation, reduced friction, and stable operation. Its taper bearing design and cylindrical profile support consistent performance across a wide range of automotive and industrial uses.

With a 1.25 in. inside diameter, 1.094 in. width, and 0.05 cone radius, this bearing is sized for specific axle and differential service applications. The WTHM88542 is used in rear outer and front outer positions across many Ford, Chevrolet, GMC, BMW, Mercedes-Benz, Dodge, and Jeep fitments.

Key Features

• Taper bearing type for differential pinion and axle service
• 1.25 in. inside diameter for application-specific fitment
• 1.094 in. width for compact driveline packaging
• Cylindrical bearing profile
• 0.05 cone radius
• Built for smooth operation and reduced friction in rotating assemblies
• Compatible with rear outer and front outer positions, depending on vehicle application

Detailed Description

InMotion part number WTHM88542 is a differential pinion bearing engineered for vehicles and equipment that rely on precise rotational support. The tapered bearing construction helps maintain stability under load, while the dimensional profile supports proper seating in the intended axle or differential assembly. This bearing is used across a broad range of applications, including Ford E-350 Super Duty, Ford F-250 Super Duty, Chevrolet Express 2500, GMC Savana 2500, BMW 3 Series and X5 models, and Mercedes-Benz 4Matic vehicles.

This part cross-references no listed interchange numbers in the provided data. For fitment-based searches, WTHM88542 is a relevant choice for rear outer differential service on BMW 188K and 188N differential applications and for front outer axle service on select Ford and Mercedes-Benz platforms.

What It Helps Address

• Noise from worn differential pinion bearings
• Excessive friction in rotating driveline components
• Loose or unstable bearing support in axle assemblies
• Vibration related to bearing wear in rear outer or front outer positions
• Service needs on vehicles with Spicer axle and BMW differential applications

Installation Notes and Tips

Verify axle type, differential code, and bearing dimensions before installation. This bearing is listed for specific rear outer and front outer applications, so confirm the vehicle’s axle configuration, including Spicer 60, Spicer 60-1, Spicer 60-SF, Spicer 70-2U, Spicer 70HD, Spicer 71, BMW 188K, BMW 188N, or Mercedes-Benz 4Matic system references where applicable. Proper bearing preload, race condition, and seal inspection should be checked during service.

• Fits 2016-2018 Ford E-350 Super Duty, rear outer, with Spicer 70-2U Axle
• Fits 2005-2018 Ford F-250 Super Duty, front outer, with Spicer 60-SF Axle
• Fits 2003-2017 Chevrolet Express 2500, rear outer, with Spicer 60 Axle
• Fits 2010-2012 Mercedes-Benz GL350, front outer, Mercedes-Benz 4Matic System
• Fits 2007-2009 BMW 335i, rear outer, with BMW 188N Differential
• Fits 2004-2009 BMW X3, rear outer, with BMW 188K Differential

Quality Assurance

InMotion manufactures this bearing from high-quality materials for dependable service in automotive and industrial environments. The design focuses on durability, smooth operation, and consistent performance across the listed applications.