kickdown cable making problem

Well, lets get the totally incorrect assumption that the transmission "works fine" without the kickdown installed. It does not. The Torqueflite transmission MUST utilize some form of throttle pressure control, be it with solid linkage or a cable. Without that, the transmission will burn up 3rd gear first, followed by 2nd and finally first. The throttle pressure must increase in order to hold the clutches together as more power is applied. Unless you use a manual valve body, the kickdown linkage or cable MUST be used.