Are you sure it's a trans problem?? A trans will not shift properly if the engine is not performing correctly. With the engine sputter you need to check the fuel filter or possibly fuel pump starving the engine for fuel. It may run good at slow to moderate speeds and fall on it's face when you need to get into passing gear. The reason I say this I have repaired a car for a friend who had a similar complaint,and have seen it several times since.I reread what you said about the T/V cable and it doesn't make it kick down it controls how soft or firm your shifts are. The governor controls the kick down. At least that's the way I remember it.