Bolted to the crankshaft, this flexible plate transmits the engine power to the torque tube. If you have a loud rattle noise at idle, small bits of rubber littering your garage floor, this is likely the culprit. The rubber material in this piece is getting to be pretty old, and with age, the rubber becomes brittle. Once broken, this piece requires immediate attention, as it could damage your reference mark sensors or, if left broken for extended periods of time, your transaxle internals.