Drivetrain› Manual Transmissions and Components

TwinPower

Twin Power 07-15 Big Twin 06 Dyna Transmission Mainshaft Seal Replaces H-D 12077 10 Pk

$106.55

SKU: T09O 043287

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Non-Returnable Item

Description

The Twin Power Transmission Mainshaft Seal is a replacement seal designed for 6-speed transmissions. It replaces Harley-Davidson part number 12077 and is sold in a pack of 10.

This seal fits 2007-2015 Twin Cam Big Twin and 2006 Dyna 6-speed transmissions, serving to seal the mainshaft at the primary side.

Fitment

Fitment Guaranteed

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on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandTwinPower
Part NumberT09O 043287

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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