Patent ID: 7086989

Claim:
A method for transferring drive torque from a power-outputting clutch to a power-receiving clutch in a transmission having an input, an output and various gear speeds between the input and output, the method comprising the steps of: transmitting torque through the power-outputting clutch while the power-receiving clutch is open; increasing a magnitude of torque transmitted by the power-receiving clutch; decreasing a torque capacity of the power-outputting clutch; maintaining said torque capacity of the power-outputting clutch greater than the magnitude of torque transmitted by the power-outputting clutch during a first period of the torque transfer; controlling slip across the power-receiving clutch during a second period in which the torque capacity of the power-outputting clutch is equal to or less than the torque magnitude transmitted by the power-outputting clutch; increasing the magnitude of torque transmitted by the power-receiving clutch to a predetermined torque magnitude during the second period; fully opening the power-outputting clutch; and transmitting torque between the input and output through the power-receiving clutch.