The TP sensor implies the throttle plate angle. If the driver accelerates to large-open up throttle, the TCM disengages the TCC to downshift. Listen for Strange Noises:  Shell out near interest to any strange sounds coming in the transmission region, Particularly through acceleration or deceleration.  Whining, clunking, or rattling noises  https://arthurvvusp.blazingblog.com/34001886/5-simple-techniques-for-torque-converter-clutch