•  Transmission upshifting is controlled by the TCM. The TCM receives inputs from various engine or vehicle sensors and driver demands to control shift scheduling, shift feel and torque converter clutch (TCC) operation.

•  The TCM has an adaptive learn strategy to electronically control the transmission which will automatically adjust the shift feel.

•  Even if the battery is disconnected or a new battery installed, transmission operating parameters are kept. The TCM must relearn these parameters.

•  Under certain conditions the transmission will downshift automatically to a lower gear range (without moving the range selector lever).

•  There are 3 categories of automatic downshifts: coastdown, torque demand and forced or kickdown shifts.

•  The coastdown downshift occurs when the vehicle is coasting down to a stop.

•  The torque demand downshift occurs (automatically) during part throttle acceleration when the demand for torque is greater than the engine can provide at that gear ratio.

•  If applied, the transmission will disengage the TCC to provide added acceleration.

•  For maximum acceleration, the driver can force a downshift by pressing the accelerator pedal to the floor.

•  A forced downshift into a lower gear is possible below calibrated speeds.

•  Specifications for downshift speeds are subject to variations due to tire size and engine and transmission calibration requirements.