National 28580 Manual Transmission Input Shaft Bearing

Manual Transmission Input Shaft Bearing

National Part Number 28580 is a taper bearing cone for manual transmission input shaft applications and related axle positions listed below. It uses premium-grade steel with crowned raceways and rollers to promote even load distribution, helping maintain smooth bearing operation in demanding driveline service.

• Part type: Manual transmission input shaft bearing
• Part description: Taper bearing cone
• Cone bore: 2.0000 in. / 50.8000 mm
• Cone length: 1.0000 in. / 25.4000 mm
• Cone radius: 0.1400 in. / 3.5560 mm
• Premium-grade steel construction for durability in transmission and differential use
• National 28580 is listed across manual transmission and axle applications, including Ford F-250 Super Duty, Ford F-350 Super Duty, Chevrolet Silverado 2500 HD, GMC Sierra 3500, Audi R8, and Lamborghini Gallardo

Application Details

This bearing cone is used in drivetrain assemblies where precise roller support and consistent load handling are required. National 28580 appears in fitments for 1999-2010 Ford F-250 Super Duty and 1999-2010 Ford F-350 Super Duty, plus 2001-2006 Chevrolet Silverado 2500 HD, 2001-2006 Chevrolet Silverado 3500, 2001-2006 GMC Sierra 2500 HD, and 2001-2006 GMC Sierra 3500. It also cross-references SKF BR28580 for the same application.

Additional fitment includes 2008-2014 Lamborghini Gallardo, rear, with Oerlikon Graziano RDM Differential; 2008-2011 Audi R8, rear, with Oerlikon Graziano RDM Differential; 2003-2005 Ford F-350 Super Duty with ZF S5-47 Transmission; 1997-1999 Ford F-250 with ZF S5-47 Transmission; 1997 Ford F-250 HD; 1987-1997 Ford F-350; 1988-1996 Ford F-150; 1987-1996 Ford F-250; 1987-1991 Ferrari Testarossa, rear right, with Ferrari Axle; 1988-1989 Ford E-350 Econoline; and 1953-1955 Ford F-100, F-250, and F-350, rear left, with Rockwell A150 Axle.

What It Helps Address

• Excess bearing play or looseness in the input shaft area
• Noise caused by worn taper bearing surfaces
• Rough rotation from damaged rollers or raceways
• Load distribution issues in high-torque drivetrain service
• Service replacement needs for National 28580 applications

Installation Notes and Tips

Verify the cone bore, length, and radius against the original bearing before installation. Confirm transmission, differential, axle, and position details exactly as listed for your vehicle, especially on Audi R8, Lamborghini Gallardo, Ferrari Testarossa, and Ford applications with specific transmission or axle notes. Clean the mating surfaces thoroughly and inspect the cup/race condition before assembly.

Quality Assurance

National manufactures this taper bearing cone with premium-grade steel and crowned raceways and rollers to support even load distribution. The part number 28580 is a direct reference for ordering and service matching, and it is also listed under SKF BR28580 for the same application.