Dorman 600-125 Transfer Case Housing - Front

Dorman 600-125 Transfer Case Housing

Restore the transfer case on select Chevrolet Silverado and GMC Sierra heavy-duty trucks with this Dorman transfer case housing. Built from aluminum alloy and supplied with new seals, it matches the fit and function of a cracked or leaking original housing for a cleaner, leak-resistant repair.

Key Features

• Aluminum alloy construction for strength and corrosion resistance
• Silver finish with a 19-inch length and 17 mounting holes
• Direct replacement for a damaged transfer case housing
• Includes new seals for leak-free installation
• Fits manual shift transfer case applications on select front-position units

Detailed Description

Dorman 600-125 is a transfer case housing engineered for select 2001-2007 Chevrolet Silverado and GMC Sierra trucks with manual shift transfer cases. It is built to match the original housing’s fit and function, making it a practical replacement when the OE housing is cracked, warped, or leaking. The aluminum alloy construction supports durability, while the included seals help maintain a tight seal after installation. This part cross-references OE number 12478078 for the same application.

Compatible With 2001-2006 Chevrolet Silverado 2500 HD, front; 2001-2006 Chevrolet Silverado 3500, front; 2001-2006 GMC Sierra 2500 HD, front; 2001-2006 GMC Sierra 3500, front; 2006 Chevrolet Silverado 2500, front; 2007 Chevrolet Silverado 2500 HD Classic, front; and 2007 Chevrolet Silverado 3500 Classic, front. Dorman 600-125 is a direct-fit solution for these manual shift transfer case applications.

Common Repair Uses

• Fixes transfer case fluid leaks caused by a cracked housing
• Replaces a warped or damaged OE housing
• Addresses sealing issues at the transfer case case halves
• Supports repair after impact or corrosion damage
• Helps restore proper transfer case enclosure on front-position units

Installation Notes and Tips

Verify manual shift transfer case configuration before installation. Inspect mating surfaces carefully and clean away old seal material, debris, and fluid residue before assembly. Confirm all mounting points align with the 17-hole housing layout and follow the vehicle service procedure for transfer case removal, sealing, and refill.

Quality Assurance

Dorman manufactures replacement components to match original equipment fit and function. This housing includes new seals to support a leak-resistant repair and is built from aluminum alloy for dependable service in demanding truck applications.