How many of these bearings do I need for my transmission?

The manufacturer states that two of bearing #60-1457 are required to service one transmission. This listing is for a single main drive gear bearing.

What is the main function of this bearing?

This bearing supports the main drive gear within your transmission, allowing it to spin freely and efficiently. A healthy bearing is essential for smooth gear changes and reliable power delivery.

Does this bearing come with any installation hardware?

This product listing is for the main drive gear bearing only. Installation hardware is not included, and you should refer to the manufacturer's service manual for proper installation procedures.

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Trusted Since 1957

Est. 1957

Twin Power 80-84 5 Speed Big Twin Main Drive Gear Bearing Replaces H-D 8978

Specifications

Brand: TwinPower
Part #: 601451
UPC: 887337412245

Twin Power 80-84 5 Speed Big Twin Main Drive Gear Bearing Replaces H-D 8978

Name: Twin Power 80-84 5 Speed Big Twin Main Drive Gear Bearing Replaces H-D 8978
Brand: TwinPower
SKU: twinpower-twin-power-80-84-5-speed-big-twin-main-drive-gear-bearing-replaces-h-d-t14-610760
Price: 44.02 USD
Availability: BackOrder

$44.02

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Twin Power 5 Speed Big Twin main drive gear bearing replaces H-D 8978 for 1980-1984 models.

Key Features

Fits 1980-1984 Harley-Davidson 5-speed Big Twin transmissions.
Replaces Harley-Davidson part number 8978.
Designed for smooth operation of the main drive gear.
Helps ensure proper power transfer through the drivetrain.

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Will this fit your vehicle?

Product Details

This Twin Power main drive gear bearing is built to replace the stock unit in 5-speed Big Twin Harley-Davidson transmissions from 1980 through 1984. It's designed to fit a range of popular models, including the Electra Glide Sport, Super Glide, and Softail Standard, ensuring your transmission's main drive gear spins smoothly and reliably. When you're rebuilding the top end of your engine or addressing transmission issues, a well-built bearing like this is crucial for proper operation.

This bearing directly replaces the Harley-Davidson part number 8978, making it a straightforward swap for mechanics familiar with these bikes. While the manufacturer description notes that two of a related bearing (#60-1457) are needed for a full transmission service, this specific part addresses the main drive gear bearing requirement. Ensuring this component is in good condition helps maintain smooth gear engagement and power transfer through your drivetrain.