Shift Pattern

Upshifts
Upshifts are controlled by the transaxle control module (TCM). The TCM receives input from the PCM, output shaft speed sensor (OSS), throttle position sensor (TPS), transmission fluid temperature (TFT) Sensor, and vehicle rpm to determine the optimal upshift points. Torque converter clutch (TCC) operation and shift feel are also determined by the TCM.

Downshifts
Under certain conditions, the transaxle will automatically downshift to a lower gear range without manual movement of the shifter lever. There are three categories of automatic downshifts: coastdown, torque demand, and forced (kickdown) shifts.

Coastdown
The coastdown downshift occurs as the vehicle is coasting down to a stop. The transaxle automatically downshifts to match gear range to vehicle speed.

Torque Demand
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.

Kickdown
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.