The Chelsea 489 Series 8-Bolt 21/37 Power Take-Off is the ultimate mechanical shift power take off designed to meet the demands of heavy duty applications. With an 8-bolt mounting option and a speed ratio of 21/37, this PTO is built to deliver reliable and efficient performance. It features an air shift type, making it easy to operate and control. It also comes with a 1-1/4" round standard shaft, eliminating the need for an adaptor plate and reducing installation time. Additionally, the PTO does not require pressure lube, reducing expenses and the chance of leakage. Overall, this reliable and efficient mechanical shift power take off is built to withstand the toughest applications. The Chelsea 489 Series of PTOs also offers a wide range of shifter options and pump flanges, this PTO can be customized to meet your specific needs. This PTO offers eleven speed ratios, including greaseable and rotatable options, ensuring that you can find the perfect match for your application. With its wide range of options and customizable features, this PTO is the perfect choice for any heavy duty application. FleetPride is your First Click in Heavy Duty®.