With such a construction, after a speed change requirement is detected, the input torque is reduced by a predetermined amount by the input torque reduction step or {HEAD ~ device}, and when a time corresponding to the speed change element engagement commencement time during speed change is detected, {TAIL ~ the reduction control} of the input torque by said input torque reduction step or device is completed 
With such a construction , after a speed change requirement is detected , the input torque is reduced by a predetermined amount by the input torque reduction step or { HEAD ~ device } , and when a time corresponding to the speed change element engagement commencement time during speed change is detected , { TAIL ~ the reduction control } of the input torque by said input torque reduction step or device is completed
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