The Chelsea 5P1057 is a genuine Chelsea input gear for PTO (Power Takeoff) applications. The input gear is a core drivetrain component within the PTO assembly, transmitting engine rotation from the transmission into the power takeoff unit. Chelsea PTOs are widely used across heavy-duty truck and vocational vehicle platforms, and sourcing the correct input gear is critical to proper PTO function. Pro Gear and Transmission carries this genuine Chelsea part. Call us to confirm proper fit for your specific PTO model and vehicle application before ordering.FeaturesGenuine Chelsea part number 5P1057Input gear for Chelsea Power Takeoff (PTO) assembliesCritical drivetrain component transmitting rotational input into the PTO unitSold by Pro Gear and TransmissionCall us to confirm compatibility with your specific Chelsea PTO modelUsed in these Chelsea PTO models440 Series446 Series447 Series488 Series