SKF SDK321-QMK Axle Differential Bearing and Seal Kit - Rear

SKF Axle Differential Bearing and Seal Kit

SKF SDK321-QMK is an axle differential bearing and seal kit for rear differential service on a wide range of GM trucks and SUVs. It is built around matched bearing cones and cups, plus seals made to SKF standards with Bore-Tite coating for improved sealing performance.

Use this kit when servicing the rear differential on applications such as the Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade. The SKF SDK321-QMK is designed to support a complete differential repair with components selected to meet or exceed original equipment specifications.

Key Features

• Part number: SDK321-QMK
• Axle differential bearing and seal kit for rear service
• Inside diameter: 11.0000
• Width: 2.500
• Bearing type: DIFF4TP
• Matched bearing cones and cups for proper bearing service
• Seals built to SKF standards with Bore-Tite coating
• Designed for GM rear differential applications with 8.50" and 8.625" ring gears

Detailed Description

SKF SDK321-QMK is a service kit for rear axle differential repair on select Chevrolet, GMC, Cadillac, Hummer, and Saab vehicles. It is engineered for applications including 2009-2015 Chevrolet Silverado 1500 rear, 2009-2015 GMC Sierra 1500 rear, and 2009-2014 Cadillac Escalade rear. This kit also covers other rear differential applications such as Chevrolet Suburban 1500, GMC Yukon, Chevrolet Avalanche, and GMC Canyon, depending on the vehicle and axle configuration.

SKF builds these kits with bearings, seals, and related service components selected for a complete repair. The bearing sets use matching cones and cups, while the seals use Bore-Tite coating to improve sealing performance. This helps restore differential serviceability on vehicles that need rear axle bearing and seal replacement.

This part cross-references 005-409-123 and JD8944T for the same application.

Common Repair Uses

• Rear differential bearing noise on Chevrolet Silverado 1500 and GMC Sierra 1500
• Oil seepage at the rear axle seal on Cadillac Escalade and Escalade ESV
• Wear-related differential service on Chevrolet Suburban 1500 and GMC Yukon
• Maintenance repair for rear axle components on Chevrolet Avalanche and GMC Canyon
• Service replacement for rear differential bearings and seals on Hummer H3 and H3T

Installation Notes and Tips

Verify axle and ring gear size before ordering. This kit is listed for rear applications with 8.50" and 8.625" ring gears on many GM platforms, and fitment varies by model year and axle configuration. Confirm the vehicle’s rear differential setup, bearing dimensions, and service requirements before disassembly.

Professional differential setup is recommended after bearing and seal replacement. Proper preload, backlash, and seal installation are critical to long-term performance.

Quality Assurance

SKF manufactures these service kits to high quality standards and states that the included components meet or exceed original equipment specifications. The kit is intended to provide the parts needed for a complete differential repair, helping reduce repeat service from incomplete repairs.