National 3780 Transfer Case Output Shaft Bearing - Front Outer, Rear Inner or Rear Outer

Transfer Case Output Shaft Bearing for Hummer H1

National 3780 is a taper bearing cone for transfer case output shaft service, built with premium-grade steel and crowned raceways and rollers for even load distribution. It is a direct-fit option for select Hummer H1 front outer and rear outer applications.

Key Features

• Taper bearing cone for transfer case output shaft use
• Premium-grade steel construction
• Crowned raceways and rollers for more even load distribution
• Cone bore: 2.0000 in. (50.8000 mm)
• Cone length: 1.1930 in. (30.3020 mm)
• Cone radius: 0.1400 in. (3.5560 mm)
• Part number: 3780

Detailed Description

The National 3780 transfer case output shaft bearing is a taper bearing cone engineered for driveline service where stable support and consistent load handling matter. Its 2.0000-inch cone bore, 1.1930-inch cone length, and 0.1400-inch cone radius provide the dimensional details needed for accurate matching during transfer case repair. This bearing is listed for 2002-2004 and 2006 Hummer H1 models in both rear outer and front outer positions, making it a relevant choice when servicing the transfer case output shaft on those vehicles. The National 3780 also cross-references SKF BR3780 for the same application.

Common Repair Uses

• Replacing a worn transfer case output shaft bearing
• Addressing driveline noise from the transfer case area
• Correcting roughness or play at the output shaft
• Restoring proper bearing support in Hummer H1 transfer case service
• Resolving bearing wear found during transfer case teardown

Installation Notes and Tips

Verify cone bore, length, and radius against the removed bearing before installation. Clean and inspect the shaft, races, and surrounding transfer case components for scoring or heat damage, and replace any worn mating parts as needed. Proper bearing seating and preload setup are important for long-term service life, so follow the vehicle service procedure for the transfer case being repaired. Fits 2002-2004 Hummer H1, rear outer. Fits 2002-2004 Hummer H1, front outer. Fits 2006 Hummer H1, rear outer. Fits 2006 Hummer H1, front outer.

Quality Assurance

National manufactures this taper bearing cone with premium-grade steel and crowned raceways and rollers to promote even load distribution in transfer case service. Part number 3780 is built to meet the dimensional and material requirements expected for driveline bearing replacement.