The TP sensor suggests the throttle plate angle. If the driving force accelerates to large-open up throttle, the TCM disengages the TCC to downshift. In a torque converter you can find at least a few rotating components: the impeller, and that is mechanically driven by the key mover; the turbine, https://torque-converter-clutch25789.prublogger.com/33136156/not-known-factual-statements-about-torque-converter-clutch