Carhenge in Alliance, Nebraska: Stonehenge Made of Cars Silly America A 1429001 AI Driven Disc (Rockford). One New Aftermarket Replacement Driven Disc for Rockford PTO Clutch This aftermarket replacement driven disc is a friction clutch disc used in Rockford style power take off (PTO) clutch assemblies. The driven disc is a core wear component in the Rockford over center PTO clutch, transmitting engine torque to the output shaft on industrial, agricultural, and construction equipment. Rockford PTO clutches are now manufactured and supported by Twin Disc. This disc replaces OEM part number 1429001 and is also stocked under interchange number A 04033802. Replaces Part Number(s): A 1429001, A 1429001 AI, 1429001, A 04033802 New aftermarket replacement part not remanufactured, not used.