A method for bedding-in an automatic transmission of a vehicle having an engine and a powertrain controller, the powertrain controller configured to measure and learn about a transmission variation and adapt one or more operational parameters associated with shifting of the automatic transmission responsive to the transmission variation, the transmission having an input shaft receiving torque from the engine, the method comprising the steps of: operating the vehicle according to a predetermined protocol so that the powertrain controller can learn about powertrain variations and adapt operation of the transmission; obtaining feedback information from the powertrain controller, the feedback information including accelerator pedal position information and i) transmission torque converter speed information and optionally, ii) prohibit value information, wherein said prohibit value information includes information for determining whether the power controller was prohibited from adaptation because of poor driving conditions such as unacceptable output speed, gradient or hill, oil temperature and first shift event of the day; determining whether a position of an accelerator pedal during the step of operating the vehicle according to the predetermined protocol was within an acceptable position range based on the accelerator pedal position information; determining whether a level of at least one of - run-up, wherein the level of run-up is determined by substracting an expected torque converter speed in a current gear from the actual torque converter speed, wherein the transmission is experiencing run-up when said difference is greater than zero, and - tie-up, wherein the level of tie-up is determined by substracting the expected torque converter speed in a next gear from the actual torque converter speed, wherein the transmission is experiencing tie-up when said difference is less than zero, remained below a corresponding run-up and tie-up threshold during operation of the predetermined protocol; and completing the bedding-in process if the position of the accelerator pedal was within the acceptable position range during operation of the predetermined protocol and the level of at least one of run-up and tie-up did not exceed the corresponding run-up and tie-up threshold during operation of the predetermined protocol. operating the vehicle according to a predetermined protocol so that the powertrain controller can learn about powertrain variations and adapt operation of the transmission; obtaining feedback information from the powertrain controller, the feedback information including accelerator pedal position information and i) transmission torque converter speed information and optionally, ii) prohibit value information, wherein said prohibit value information includes information for determining whether the power controller was prohibited from adaptation because of poor driving conditions such as unacceptable output speed, gradient or hill, oil temperature and first shift event of the day; determining whether a position of an accelerator pedal during the step of operating the vehicle according to the predetermined protocol was within an acceptable position range based on the accelerator pedal position information; determining whether a level of at least one of - run-up, wherein the level of run-up is determined by substracting an expected torque converter speed in a current gear from the actual torque converter speed, wherein the transmission is experiencing run-up when said difference is greater than zero, and - tie-up, wherein the level of tie-up is determined by substracting the expected torque converter speed in a next gear from the actual torque converter speed, wherein the transmission is experiencing tie-up when said difference is less than zero, - run-up, wherein the level of run-up is determined by substracting an expected torque converter speed in a current gear from the actual torque converter speed, wherein the transmission is experiencing run-up when said difference is greater than zero, and - tie-up, wherein the level of tie-up is determined by substracting the expected torque converter speed in a next gear from the actual torque converter speed, wherein the transmission is experiencing tie-up when said difference is less than zero, remained below a corresponding run-up and tie-up threshold during operation of the predetermined protocol; and completing the bedding-in process if the position of the accelerator pedal was within the acceptable position range during operation of the predetermined protocol and the level of at least one of run-up and tie-up did not exceed the corresponding run-up and tie-up threshold during operation of the predetermined protocol.