SKF JH1612 Transfer Case Main Shaft Bearing - Front, Front Rearward or Rear

SKF JH1612 Transfer Case Main Shaft Bearing

The SKF JH1612 is a needle roller transfer case main shaft bearing built for compact driveline assemblies where space is limited. With a 1.000 in inside diameter, 1.312 in outside diameter, and 0.750 in width, it is sized for precise support in transfer case applications across Chevrolet, GMC, Ford, and Oldsmobile platforms.

Key Features

• Needle roller bearing design for transfer case main shaft support
• 1.000 in inside diameter for proper shaft fitment
• 1.312 in outside diameter for housing fitment
• 0.750 in width for compact transfer case packaging
• SKF-engineered bearing construction for long service life
• Fits applications including Chevrolet Astro, GMC Safari, and Chevrolet S10 transfer cases

Application Details

SKF JH1612 is used in transfer case assemblies that require a compact main shaft bearing with accurate dimensional control. It is listed for 1990-1998 Chevrolet Astro and GMC Safari front rearward positions, plus Borg Warner 4472 applications in the 1991-1997 Chevrolet S10, 1992-1997 GMC Jimmy, 1991-1997 GMC Sonoma, and related Chevrolet Blazer and S10 Blazer models. This part cross-references Bosch 66810 for the same application.

What It Helps Repair

• Transfer case shaft noise caused by worn bearing surfaces
• Excessive play in the main shaft area
• Rough operation during 4WD engagement
• Vibration traced to internal transfer case wear
• Damage from bearing fatigue in compact driveline units

Installation Notes

Verify the bearing dimensions against the original part before installation, especially the inside diameter, outside diameter, and width. Confirm transfer case type and position, including Borg Warner 4472 or Spicer 20 applications where listed. Clean the housing thoroughly and inspect the shaft and race surfaces for wear before assembly. For 1984 Ford Ranger and 1967-1974 Chevrolet and GMC Spicer 20 applications, match the transfer case configuration exactly to the vehicle.

Quality Assurance

SKF has supplied bearing solutions for more than a century, and this JH1612 is manufactured to high quality standards for durability and safety in driveline service.