
The Story
LuK Differential Bearing Kit for Rear Axles
The LuK GDK325B-MK is an axle differential bearing and seal kit for rear differential service on a wide range of GM trucks and vans. It includes OE-quality bearings selected for the specific transmission or differential application, giving technicians the parts needed for a professional repair.
- Axle differential bearing and seal kit for rear service
- OE-quality components selected for the application
- Built for professional transmission and differential repair work
- Direct service solution for GM rear 10.5" applications
- Part number: GDK325B-MK
Application Coverage
Compatible with rear 10.5" applications on Chevrolet Express 2500, Chevrolet Express 3500, GMC Savana 2500, and GMC Savana 3500 from 1998-2020. It also fits 2021-2023 Chevrolet Express 2500 and Express 3500, plus 2021-2023 GMC Savana 2500 and Savana 3500 as a Master Differential Kit. Additional coverage includes Chevrolet Silverado 2500 HD, Silverado 3500 HD, Suburban 2500, Suburban 3500 HD, Avalanche 2500, C2500, C3500, K2500, K3500, P30, and GMC Sierra 2500 HD, Sierra 3500 HD, Sierra 2500, Sierra 3500, Yukon XL 2500, C2500, C3500, K2500, K3500, and P3500 rear applications. This part cross-references SKF SDK325-BMK for the same application.
What It Helps Repair
- Rear differential bearing noise
- Worn or damaged differential bearings
- Seal-related fluid leakage during differential service
- Transmission or driveline repair jobs requiring bearing replacement
- Service work on GM 10.5" rear axle assemblies
Installation Notes
Verify axle size, rear position, and model-year coverage before installation. This kit is intended for professional differential service, so bearing preload, gear setup, and seal installation should be checked during assembly. Confirm the vehicle application against the exact rear axle configuration before ordering.
Quality Assurance
LuK selects OE-quality components for each specific transmission or differential application to support a professional repair result. Part number GDK325B-MK is built for service use on the listed GM rear axle applications.
Description
LuK Differential Bearing Kit for Rear Axles
The LuK GDK325B-MK is an axle differential bearing and seal kit for rear differential service on a wide range of GM trucks and vans. It includes OE-quality bearings selected for the specific transmission or differential application, giving technicians the parts needed for a professional repair.
- Axle differential bearing and seal kit for rear service
- OE-quality components selected for the application
- Built for professional transmission and differential repair work
- Direct service solution for GM rear 10.5" applications
- Part number: GDK325B-MK
Application Coverage
Compatible with rear 10.5" applications on Chevrolet Express 2500, Chevrolet Express 3500, GMC Savana 2500, and GMC Savana 3500 from 1998-2020. It also fits 2021-2023 Chevrolet Express 2500 and Express 3500, plus 2021-2023 GMC Savana 2500 and Savana 3500 as a Master Differential Kit. Additional coverage includes Chevrolet Silverado 2500 HD, Silverado 3500 HD, Suburban 2500, Suburban 3500 HD, Avalanche 2500, C2500, C3500, K2500, K3500, P30, and GMC Sierra 2500 HD, Sierra 3500 HD, Sierra 2500, Sierra 3500, Yukon XL 2500, C2500, C3500, K2500, K3500, and P3500 rear applications. This part cross-references SKF SDK325-BMK for the same application.
What It Helps Repair
- Rear differential bearing noise
- Worn or damaged differential bearings
- Seal-related fluid leakage during differential service
- Transmission or driveline repair jobs requiring bearing replacement
- Service work on GM 10.5" rear axle assemblies
Installation Notes
Verify axle size, rear position, and model-year coverage before installation. This kit is intended for professional differential service, so bearing preload, gear setup, and seal installation should be checked during assembly. Confirm the vehicle application against the exact rear axle configuration before ordering.
Quality Assurance
LuK selects OE-quality components for each specific transmission or differential application to support a professional repair result. Part number GDK325B-MK is built for service use on the listed GM rear axle applications.












