Torque estimation method for an internal combustion engine

A method is presented for correcting estimates of engine output torque. Engine output torque estimates are corrected when the accessory is disengaged from the engine (610). In one example, these corrections are made when engine output torque is known to be substantially zero from torque converter speed ratio being substantially one (590) or from the timing of the overrunning clutch engagement when the transmission output speed becomes greater than the input speed (660). This information is then used to control engine output torque to improve drive feel and vehicle performance.