Yukon Pinion Adapter Kit for Bearing Puller Tool. Yukon Gear & Axle leads the aftermarket in performance drivetrain products. Thats why Yukon has developed its own line of drivetrain-specific tools to better support the professional installer and do-it-yourself garage guru.. Yukon Gear & Axle leads the aftermarket in performance drivetrain products. Thats why Yukon has developed its own line of drivetrain-specific tools to better support the professional installer and do-it-yourself garage guru. The old saying have the right tools for the job has never been more important. Drivetrain installation is an art in itself, and having purpose-built tools makes the process easier.