A method and system to control transmission shifting in a motor vehicle
having an automatic transmission is provided, wherein a command for a
transmission up-shift is detected, and, inhibited, based upon operator
input, engine speed, and vehicle operating conditions. A fuel cutoff
event is immediately implemented, along with electrical energy
regeneration using vehicle kinetic energy. Operator input includes
monitoring accelerator pedal input, and inhibiting the command for the
transmission up-shift when a tip-out event occurs. The command for
inhibiting the transmission up-shift is discontinued when an accelerator
pedal tip-in is detected, or accelerator pedal position is greater than a
calibrated value, or when engine output torque exceeds a torque
threshold, or when engine speed exceeds a speed threshold.