Luk GDK321Q Axle Differential Bearing and Seal Kit - Rear

OE-Quality Differential Bearing Kit

The LuK GDK321Q differential bearing kit provides the OE-quality bearings needed for a professional rear differential repair. It is built for service work on a wide range of GM full-size trucks and SUVs, including Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade applications.

This kit is a direct-fit service solution for rear standard differential repairs on select Chevrolet, GMC, Cadillac, and Saab vehicles. The GDK321Q is selected for the specific transmission and driveline application to support accurate bearing replacement during rebuild work.

Key Features

• OE-quality differential bearing kit for professional repair work
• Designed for rear standard differential applications
• Application-specific components selected for the transmission or driveline setup
• Cross-references Timken DRK321Q and interchange numbers 4620189100, SDK321Q
• Part number: GDK321Q

Vehicle Fitment

• Fits 2022 Chevrolet Silverado 1500 LTD, rear, Standard Differential Kit
• Fits 2022 GMC Sierra 1500 Limited, rear, Standard Differential Kit
• Fits 2009-2021 Chevrolet Silverado 1500, rear, Standard Differential Kit
• Fits 2009-2021 GMC Sierra 1500, rear, Standard Differential Kit
• Fits 2009-2020 Cadillac Escalade, rear, Standard Differential Kit
• Fits 2009-2020 Cadillac Escalade ESV, rear, Standard Differential Kit
• Fits 2009-2020 Chevrolet Tahoe, rear, Standard Differential Kit
• Fits 2009-2020 GMC Yukon, rear, Standard Differential Kit
• Fits 2015-2020 GMC Yukon XL, rear, Standard Differential Kit
• Fits 2009-2014 Chevrolet Express 1500, rear, Standard Differential Kit
• Fits 2009-2014 Chevrolet Suburban 1500, rear, Standard Differential Kit
• Fits 2009-2014 GMC Savana 1500, rear, Standard Differential Kit
• Fits 2009-2014 GMC Yukon XL 1500, rear, Standard Differential Kit
• Fits 2009-2013 Cadillac Escalade EXT, rear, Standard Differential Kit
• Fits 2009-2013 Chevrolet Avalanche, rear, Standard Differential Kit
• Fits 2009-2012 Chevrolet Colorado, rear, Standard Differential Kit
• Fits 2009-2012 GMC Canyon, rear, Standard Differential Kit
• Fits 2009 GMC Envoy, rear, Standard Differential Kit
• Fits 2009 Saab 9-7x, rear, Standard Differential Kit

Common Repair Uses

• Rear differential bearing wear or noise
• Gear whine during acceleration or deceleration
• Excessive play in differential components
• Service replacement during differential rebuilds
• Restoring proper bearing support in the rear axle assembly

Installation Notes

Verify axle and differential configuration before ordering, since this kit is listed for standard rear differential applications only. Professional installation is recommended for differential service because bearing preload, gear setup, and inspection procedures are critical to repair quality.

Quality Assurance

LuK states that this kit uses OE-quality bearings selected for the specific transmission application, supporting a professional-level repair standard. The GDK321Q is built as a service kit for rear differential bearing replacement on confirmed fitments such as Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade models.