National 15126 Transfer Case Output Shaft Bearing - Rear

Transfer Case Output Shaft Bearing for Full Time 4WD

National 15126 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 Chevrolet and GMC full time 4WD applications that use the Rockwell T221 transfer case.

Key Features

• Taper bearing cone for transfer case output shaft applications
• Premium-grade steel construction
• Crowned raceways and rollers for more even load distribution
• Cone bore: 1.2500 in. / 31.7500 mm
• Cone length: 0.8125 in. / 20.6380 mm
• Cone radius: 0.0310 in. / 0.7870 mm
• Part number: 15126

Detailed Description

National 15126 is a transfer case output shaft bearing cone engineered for rear-position service in select full time 4WD drivetrains. The tapered design supports load handling in transfer case assemblies, while the crowned raceways and rollers help distribute contact more evenly across the bearing surface. This makes it a practical replacement for vehicles that require the specified cone bore, length, and radius dimensions. This part cross-references SKF BR15126 for the same application.

Compatible With 1969-1972 Chevrolet Blazer, rear; 1967-1972 Chevrolet K10 Suburban, rear; 1967-1972 Chevrolet K20 Suburban, rear; and 1970-1972 GMC Jimmy, rear. These applications note full time 4WD with Rockwell T221 transfer case and 2 speed differential pinion race requirements. If you are servicing a Chevrolet Blazer, Chevrolet K10 Suburban, Chevrolet K20 Suburban, or GMC Jimmy transfer case, verify the bearing dimensions and transfer case configuration before installation.

What This Part Helps Address

• Noise from a worn transfer case output shaft bearing
• Rough rotation or bearing drag in the transfer case assembly
• Excessive play at the output shaft support point
• Wear related to tapered bearing race and roller surfaces
• Service needs on Rockwell T221 full time 4WD transfer cases

Installation Notes and Tips

Confirm the cone bore, cone length, and cone radius against the original bearing before installation. Inspect the mating race, shaft surface, and transfer case components for wear or scoring, since a new bearing cone should be installed with clean, properly prepared contact surfaces. For Chevrolet Blazer, Chevrolet K10 Suburban, Chevrolet K20 Suburban, and GMC Jimmy applications, verify the Rockwell T221 transfer case and rear position fitment details before assembly.

Quality Assurance

National manufactures this bearing cone with premium-grade steel and tapered bearing geometry intended for consistent load support in transfer case service. The crowned raceway and roller design reflects National’s bearing construction standards for drivetrain repair applications.