The Chelsea 378402 is a retainer ring used in the 800 Series Power Takeoff. Listed as item 27 in the Chelsea 800 Series illustrated parts list, this lock ring serves as a retaining component within the PTO assembly. Sourcing the correct retainer ring matters during a rebuild or repair, and the Chelsea part number 378402 ensures a direct fit to the 800 Series PTO. Pro Gear and Transmission carries genuine Chelsea PTO parts. Call us to confirm proper fit for your specific application before ordering.FeaturesGenuine Chelsea part number 378402Retainer ring for the Chelsea 800 Series PTOListed as item 27 in the Chelsea 800 Series illustrated parts listQuantity of one per assemblyDirect replacement for the 800 Series Power TakeoffUsed in this Chelsea PTO model800 Series