Warn Winch Hi mount Pinion gear
On an early model hi-mount winch the 2.7hp motor is driven by a keyed shaft. if you want to update to the more common 4.6hp or 6hp Motors then this Pinion gear is required to match the motor up to the main gear.
It is easy to change or inspect to see if required, by removing the top hat from your high mount winch. be careful not to dislodge the main gear when removing and refiting the motor as this will require more disassembly to rectify.