Control device of gear transmission-equipped vehicle and method of controlling gear transmission-equipped vehicle

A control device of a gear transmission-equipped vehicle, the gear transmission-equipped vehicle including a driving source and a gear transmission that changes a rotational speed of power output from the driving source,

• the control device comprising:
• a condition determiner that determines whether or not a predetermined start condition is satisfied;
• and
• a power controller that starts power reduction control when the condition determiner determines that the start condition is satisfied, the power reduction control being control of reducing the power transmitted from the driving source to the gear transmission, wherein
• the start condition includes
• a condition that a detection value of a gear position sensor that detects a current gear position of the gear transmission falls within a transition region between engagement regions corresponding to respective gear positions, and
• a condition that a speed difference obtained by subtracting a rotational speed of an output shaft of the gear transmission from a rotational speed of an input shaft of the gear transmission is a threshold or more.