Dorman 600-126 Transfer Case Housing - Front

Transfer Case Housing for GM 4x4 Applications

This Dorman transfer case housing is a direct-fit replacement for a cracked or leaking original housing on select GM trucks and SUVs. Built from aluminum alloy and supplied with new seals, it supports a leak-free installation on electric shift 2-speed transfer cases.

Part number 600-126 is a practical OE-style solution for restoring the transfer case housing on Chevrolet Silverado, GMC Sierra, Avalanche, Suburban, and Yukon XL 2500/3500 applications. It matches the fit and function of the original housing and is built for front-position transfer case service.

Key Features

• Aluminum alloy construction for durable transfer case service
• Includes new seals for leak-resistant installation
• Matches the fit and function of the original equipment housing
• Silver finish
• 17 mounting holes for application-specific fitment
• Compatible with electric shift 2-speed transfer case setups

Detailed Description

Dorman 600-126 is a transfer case housing replacement for GM 4x4 platforms where the original housing has cracked, warped, or begun leaking. The aluminum alloy construction provides the structural support needed for transfer case operation, while the included seals help maintain a secure seal at assembly points. This part is intended for front-position transfer case housing applications and is a direct replacement for OE part number 88996603.

Compatible With 2001-2006 Chevrolet Silverado 2500, front; 2001-2006 Chevrolet Silverado 2500 HD, front; 2001-2006 Chevrolet Silverado 3500, front; 2001-2006 Chevrolet Suburban 2500, front; 2001-2006 GMC Sierra 2500 HD, front; 2001-2006 GMC Sierra 3500, front; 2001-2006 GMC Yukon XL 2500, front; 2001-2004 GMC Sierra 2500, front; 2002-2006 Chevrolet Avalanche 2500, front; and 2007 Chevrolet Silverado 2500 HD Classic, front, plus 2007 Chevrolet Silverado 3500 Classic, front, 2007 GMC Sierra 2500 HD Classic, front, and 2007 GMC Sierra 3500 Classic, front.

This part cross-references OE number 88996603 for the same application.

Common Problems This Part Can Solve

• Cracked transfer case housing
• Fluid leakage from the housing area
• Housing damage from age, stress, or impact
• Seal failure at the transfer case assembly
• Loss of proper transfer case containment on electric shift 2-speed systems

Installation Notes and Tips

Verify transfer case configuration, mounting hole count, and front-position fitment before installation. Inspect mating surfaces carefully, clean all sealing areas, and replace worn components that could affect sealing performance. Confirm the vehicle uses an electric shift 2-speed transfer case and match the application to the listed Chevrolet Silverado, GMC Sierra, Avalanche, Suburban, or Yukon XL fitment.

Quality Assurance

Dorman manufactures this housing as an OE-style replacement that matches original fit and function for the listed GM applications. The aluminum alloy construction and included seals support a proper repair for cracked or leaking transfer case housings.