Timken DRK321C Axle Differential Bearing and Seal Kit - Rear

Timken DRK321C Differential Bearing Kit

Timken DRK321C is an axle differential bearing and seal kit for rear driveline service on a wide range of GM, Cadillac, Isuzu, Honda, and Saab applications. It brings together the bearings and seals needed for differential rebuild work, with coverage for 8.5-inch and 8.6-inch ring gear setups and 3.42 ratio applications where specified.

Key Features

• Axle differential bearing and seal kit for rear service
• Timken DT Components rebuild kit format
• Includes the bearings and seals needed to complete differential service
• Standard kit configuration
• Cross-references DK321C and RA321C for the same application
• Compatible with select Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade rear differential applications

Detailed Description

Timken DRK321C is built for rear differential rebuilds where bearing and seal replacement is required. Timken markets these kits under the DT Components line, and this standard kit format is aimed at service jobs on vehicles using 8.5-inch or 8.6-inch ring gears, including many Chevrolet Silverado 1500 and GMC Sierra 1500 rear axle applications. It also covers select Cadillac Escalade, Chevrolet Tahoe, GMC Yukon, and related platforms with the listed driveline configurations.

This part cross-references DK321C and RA321C for the same application. Use DRK321C when servicing rear differential bearing and seal wear on supported vehicles such as the Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade.

What It Helps Fix

• Rear differential bearing noise
• Seal leakage at the axle differential
• Wear-related driveline vibration
• Service issues during differential rebuilds
• Maintenance on 8.5-inch and 8.6-inch ring gear assemblies

Installation Notes and Tips

Verify the axle, ring gear size, and drive ratio before ordering. Fitment varies by model year and configuration, including standard 3.42 ratio applications and select manual-transmission or transfer-case-related listings. Confirm the rear differential setup against the vehicle’s service information before installation. Professional differential setup procedures are recommended for bearing preload, backlash, and seal installation.

Quality Assurance

Timken supplies DT Components rebuild kits with the bearings and seals needed for differential service, supporting a complete repair approach for the listed rear axle applications.