Timken HM88510 Differential Pinion Race - Front Outer or Rear Outer

Timken HM88510 Differential Pinion Race

The Timken HM88510 is a differential pinion race for driveline and axle service, built around tapered roller bearing geometry for high radial and axial load handling. With a 2.875 in. outside diameter and 0.906 in. width, it is a precise replacement for rear outer and front outer applications across a wide range of trucks, vans, SUVs, and BMW performance models.

Key Features

• Part number: HM88510
• Outside diameter: 2.875 in. (73.03 mm)
• Width: 0.906 in. (23.02 mm)
• Bearing cup radius: 0.130 in. (3.30 mm)
• Tapered roller bearing component for differential pinion service
• Fits rear outer and front outer positions, depending on vehicle application
• National HM88510 interchange

Detailed Description

Timken HM88510 is engineered for differential pinion bearing service where accurate fit and load control matter. Timken tapered roller bearing components are known for handling both radial and axial forces, which is important in axle assemblies that see towing, hauling, and sustained highway use. This race is used in applications such as Ford F-250 Super Duty, Ford F-350 Super Duty, Chevrolet Express 2500, Chevrolet Express 3500, GMC Savana 2500, GMC Savana 3500, and BMW M3 fitments listed below.

This part cross-references National HM88510 for the same application. For reliable service life, replace the inner cone and outer cup together during bearing service, as noted by the manufacturer.

Common Problems This Part Addresses

• Noise from a worn differential pinion bearing race
• Rough or inconsistent pinion bearing operation
• Excessive wear in the axle or differential bearing surface
• Loss of proper bearing preload or running clearance
• Service issues during differential pinion seal and bearing repair

Fitment Notes

• Fits 2020-2021 Chevrolet Express 3500, rear outer, 9.5 in. ring gear
• Fits 2020-2021 GMC Savana 3500, rear outer, 9.5 in. ring gear
• Fits 2017-2019 Chevrolet Silverado 3500 HD, front outer
• Fits 2017-2019 Chevrolet Suburban 3500 HD, front outer
• Fits 2005-2018 Ford F-250 Super Duty, front outer
• Fits 2001-2016 Ford F-350 Super Duty, front outer
• Fits 2004-2009 BMW X3, rear outer
• Fits 2000-2009 BMW X5, rear outer
• Fits 2003-2008 BMW Z4, rear outer
• Fits 2004-2008 Dodge Ram 1500, rear outer, 9.75 in. R.G., Spicer 60 Axle
• Fits 1999-2008 Ford F-350 Super Duty, rear outer, Dana/Spicer 60 Series Axle
• Fits 1975-1997 Ford F-250, rear outer, Dana/Spicer 60, 61 Series Axles
• Fits 1988-1997 Chevrolet C3500, rear outer, Dana/Spicer 70B, 70 Heavy Duty, 70-3 Heavy Duty Axle
• Fits 1986-1988 Jeep Comanche, rear outer, Dana/Spicer 60-3 Axle
• Fits 1956-1962 Chevrolet Corvette, rear outer

Installation Notes and Tips

Confirm axle type, ring gear size, and bearing position before installation. Timken notes that the inner cone and outer cup should be replaced at the same time to maximize reliability and bearing life. On applications such as Chevrolet Express 2500 and GMC Savana 2500, the differential pinion race must be used with the differential pinion seal for proper installation.

Quality Assurance

Timken is a recognized global leader in tapered roller bearings, with engineering support focused on durability, compact load capacity, and long service life. HM88510 is built to meet the demands of differential pinion service in heavy-duty and passenger applications.