The Chelsea 37P23 is a shifter spring designed for Chelsea power takeoff (PTO) units. Shifter springs are a critical internal component of the PTO shift mechanism, maintaining proper engagement and return tension throughout the gear selection cycle. This is a genuine Chelsea part, sold by Pro Gear and Transmission. If you need help confirming this spring is the correct fit for your specific Chelsea PTO model, give us a call before ordering.FeaturesGenuine Chelsea PTO replacement partPart number: 37P23Functions as the shifter spring within the Chelsea PTO shift mechanismCall Pro Gear and Transmission to confirm compatibility with your PTO modelUsed in this Chelsea PTO model901 Series