Patent ID: 8150586

Claim:
A method for changing a gear ratio in a transmission of a motor vehicle, comprising: commencing the gear ratio change by initiating engagement of a first gear-train component with a second gear-train component at a predetermined rate; determining rotational speed of the first gear-train component; determining rotational speed of the second gear-train component; determining whether the rotational speed of the first gear-train component and the rotational speed of the second gear-train component have substantially synchronized; reducing the rate of engagement of the first gear-train component with the second gear-train component if the rotational speed of the first gear-train component has not substantially synchronized with rotational speed of the second gear-train component; increasing the rate of engagement of the first gear-train component with the second gear-train component if the rotational speed of the first gear-train component has substantially synchronized with rotational speed of the second gear-train component; and completing the gear ratio change.