A surgical instrument, comprising: a housing having at least a drive motor, a shift motor, and a single drive gear in mechanical cooperation thereof； a shaft having a proximal end and a distal end, the proximal end of the shaft connected to the housing, the shaft defining a longitudinal axis therethrough； and an end effector connected to the distal end of the shaft； wherein the drive motor mechanically cooperates with the shift motor to actuate the single drive gear.
