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

Premium replacement for the OEM main drive gear bearing to help restores smooth, quiet 5-speed operation

-   Premium replacement for the OEM main drive gear bearing to help restores smooth, quiet 5-speed operation
-   Engineered to meet or exceed factory specs for dependable performance in Big Twin applications
-   Designed as a direct-fit solution for hassle-free installation during transmission service

This Part Fits:

Year

Make

Model

Submodel

1980

Harley-Davidson

FLH Electra Glide

Base

1980-1984

Harley-Davidson

FLHS Electra Glide Sport

Base

1983-1984

Harley-Davidson

FLHTC Electra Glide Classic

Base

1980-1983

Harley-Davidson

FLT Tour Glide

Base

1980-1982

Harley-Davidson

FXB Sturgis

Base

1983

Harley-Davidson

FXDG Disc Glide

Base

1980-1984

Harley-Davidson

FXE Super Glide

Base

1980-1984

Harley-Davidson

FXEF Fat Bob

Base

1982-1984

Harley-Davidson

FXR Super Glide II

Base

1984

Harley-Davidson

FXRDG Disc Glide

Base

1982-1984

Harley-Davidson

FXRS Low Glide

Base

1983-1984

Harley-Davidson

FXRT Sport Glide

Base

1980-1982

Harley-Davidson

FXS Low Rider

Base

1983-1984

Harley-Davidson

FXSB Low Rider - Belt

Base

1980-1984

Harley-Davidson

FXWG Wide Glide

Base

## Details

- **Price:** 83.61 CAD
- **Vendor:** TwinPower
- **Type:** Bearings

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 83.61 CAD | In stock |

## Images

- Photo - Primary

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/twin-power-80-84-5-speed-big-twin-main-drive-gear-bearing-replaces-h-d-8978)
> Updated: 2026-07-14