Dorman 926-573 Drive Axle Shaft Flange Gasket - Rear

Axle Shaft Flange Gasket for Rear Service

Dorman 926-573 is a direct replacement drive axle shaft flange gasket for rear axle service on select Chevrolet Silverado HD and GMC Sierra HD trucks. It helps restore a clean seal at the axle flange when servicing axle bearings or parking brake shoes, reducing the chance of fluid seepage after repair.

Built from non-asbestos fiber and shaped as a round flange gasket, this part matches the original sealing surface for a straightforward repair on Silverado 2500 HD, Silverado 3500 HD, Sierra 2500 HD, and Sierra 3500 HD applications. The Dorman 926-573 axle shaft flange seal is made for technicians who need OE-style fitment at the rear axle flange.

Key Features

• Direct replacement drive axle shaft flange gasket
• Non-asbestos fiber construction
• Round gasket profile with 8 bolt holes
• Inside diameter: 3.06 in; outside diameter: 4.79 in
• Mounting hole diameter: 0.51 in
• Designed for rear axle flange service
• Compatible With 2011-2024 Chevrolet Silverado 2500 HD, rear
• Compatible With 2021-2024 Chevrolet Silverado 3500 HD, rear, w/Single Rear Wheel (SRW)
• Compatible With 2011-2024 GMC Sierra 2500 HD, rear
• Compatible With 2021-2024 GMC Sierra 3500 HD, rear, w/Single Rear Wheel (SRW)

Detailed Description

Dorman 926-573 is engineered as a replacement axle shaft flange gasket for rear driveline sealing service. It is intended for use during axle bearing or parking brake shoe work, where the flange seal should be renewed to maintain a leak-free repair. The non-asbestos fiber material provides a traditional gasket construction for the axle flange interface, while the round 4.79-inch profile and 8-bolt layout support proper alignment on the mounting surface. This part cross-references 20920620 for the same application.

For Chevrolet Silverado 2500 HD, Silverado 3500 HD, GMC Sierra 2500 HD, and Sierra 3500 HD rear axle service, Dorman 926-573 gives you a direct replacement sealing solution that matches the original gasket form and dimensions.

What It Helps Address

• Rear axle flange fluid seepage after bearing service
• Parking brake shoe service that requires flange resealing
• Leak paths caused by a worn or disturbed original gasket
• Improper sealing at the axle shaft flange after disassembly
• Repeat repairs caused by reusing an old flange gasket

Installation Notes and Tips

Replace the gasket any time work is performed at the axle flange. Clean the mating surfaces thoroughly before installation and verify the flange pattern, bolt hole count, and gasket dimensions match the original part before reassembly. Use the rear-position fitment listed for the specific Silverado HD or Sierra HD application.

Quality Assurance

Dorman supplies direct replacement sealing components for driveline repair, and this axle shaft flange gasket is built to match the original application requirements for rear axle service on select Chevrolet and GMC heavy-duty trucks. Part number 926-573 is intended to support a proper reseal when the axle flange has been opened for maintenance.