The torque converter clutch solenoid is usually energised (trapped on) which translates into the torque converter staying often locked. The TP sensor signifies the throttle plate angle. If the driver accelerates to large-open up throttle, the TCM disengages the TCC to downshift. This computerized transmission torque converter clutch (TCC) solenoid https://cashfgdby.blogchaat.com/34049933/torque-converter-clutch-options