Prepare your truck to be Ready for the Road Ahead™, with the Chelsea 489 Series 8-Bolt 21/37 Standard Mount Power Take-Off that provides enhanced power for auxiliary applications. Thanks to its advanced design, this replacement PTO is able to generate power for auxiliary equipment by connecting to the transmission, and converting its rotational energy into power for various devices. Constructed with top-tier components to provide long-term reliability for semis, tractors, and hydraulic engagements. FleetPride is your First Click in Heavy Duty®.