Patent ID: 7678006

Claim:
An automatic transmission of a motor vehicle, comprising: a shift mechanism including a frictional element that establishes and disestablishes an engine brake when engaged and disengaged respectively, the shift mechanism having a first speed stage in which the frictional element is able to be engaged and disengaged selectively and a second speed stage in which the frictional element is disengaged; and a control unit including a control section that controls the operation of the shift mechanism in accordance with data given thereto, a first data section having a first data that is used by the control section when a shift is carried out under a first shift mode between the first speed stage of the type that needs the engagement of the frictional element and the second speed stage and a second data section having a second data that lacks the first data and is used by the control section when a shift is carried out under a second shift mode between the first speed stage of the type that needs the disengagement of the frictional element and the second speed stage, the control section being configured to carry out: upon receiving an instruction to change the mode from the first shift mode to the second shift mode during a shift from the second speed stage to the first speed stage under the first shift mode and receiving an instruction to carry out a shift to the second speed stage, finishing the shift to the first speed stage under the first shift mode; and carrying out a shift under the second shift mode from the first speed stage to the second speed stage with reference to the first data section.