InMotion WTHM88649 Differential Pinion Bearing

Differential Pinion Bearing for Driveline Service

InMotion WTHM88649 is a taper-style differential pinion bearing built for driveline applications that demand stable rotation, reduced friction, and consistent support under load. With a 1.375 in inside diameter, 1 in width, and cylindrical bearing profile, it is a practical replacement for a wide range of rear and front axle setups.

Compatible With applications such as Chevrolet Silverado 1500 rear outer with 9.5in ring gear, Jeep Wrangler front outer with Spicer 44 axle, and Toyota Tacoma rear inner with 8.4in ring gear, this bearing is used across many truck, SUV, and 4x4 driveline configurations. Part number WTHM88649 is also a useful reference when sourcing the correct differential pinion bearing for axle-specific service.

Key Features

• Taper bearing construction for differential pinion support
• 1.375 in inside diameter for axle-specific fitment
• 1 in width for compact driveline packaging
• Cylindrical bearing profile for stable rotational performance
• Built from high-quality materials for durability in automotive and industrial use
• Universal-style design with broad application coverage

Detailed Description

WTHM88649 is engineered as a differential pinion bearing for vehicles and equipment that rely on smooth, controlled rotation at the pinion shaft. The taper bearing design helps maintain alignment and load handling in differential assemblies, while the compact dimensions support a wide range of axle and driveline layouts. This part number is listed across numerous fitments, including Chevrolet Silverado, GMC Sierra, Jeep Wrangler, Ram 2500, and Toyota Tacoma applications, making it a versatile service part for axle rebuilds and driveline repairs.

For buyers searching by vehicle, this bearing is listed for many Chevrolet Silverado 1500 and GMC Sierra 1500 rear outer applications with 9.5in ring gear, as well as Jeep Wrangler front outer applications with Spicer axle configurations. It also appears in Toyota Tacoma rear inner fitment with an 8.4in ring gear, reinforcing its broad coverage across truck and SUV driveline service.

What It Helps Address

• Pinion bearing noise during acceleration or deceleration
• Excessive friction in the differential assembly
• Loose or unstable pinion shaft support
• Wear-related driveline vibration
• Service needs during axle or differential rebuilds

Installation Notes and Tips

Verify axle type, ring gear size, and bearing dimensions before installation. This bearing is listed for multiple positions, including rear outer, front outer, rear inner, and front inner applications, so matching the exact vehicle configuration is essential. Inspect related differential components for wear, scoring, or contamination before assembly, and follow the vehicle manufacturer’s service procedures for preload and setup.

Part number WTHM88649 should be matched to the specific axle and position shown in the fitment data. If you are servicing a Chevrolet Silverado, Jeep Wrangler, or Toyota Tacoma differential, confirm the axle code and bearing location before ordering.

Quality Assurance

InMotion manufactures this bearing from high-quality materials for dependable operation across automotive and industrial environments. The design focuses on durability, smooth performance, and broad application coverage. No warranty information was provided in the product data.