The TP sensor implies the throttle plate angle. If the driving force accelerates to large-open throttle, the TCM disengages the TCC to downshift. Correcting a bad torque converter may save you a few bucks, particularly if it's so weakened that you need to switch it that has a new one. https://jaredffbyw.bloggazzo.com/33061971/considerations-to-know-about-torque-converter-clutch