Shift Patterns: 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.