Hi Milt,
The guys have covered the TV end of this pretty well as it is... let me add one more thing...
The TV cable needs a spring at one end or the other, either on the throttle end or the TV arm on the transmission. It is responsible for assuring that the thing returns to "full forward" position.
In my case my spring was too stiff and I had the same "foot cramp" symptom as you describe. First thing to do is go with the removal, cleaning and lubing.
I strongly agree with the graphite lube idea too...
Since the powdered graphite can be a tough to get it all the way down and around the inside maybe I can help with that too...
I have some graphite lube in liquid suspension kicking around I think. If you want to send me your full mailing address/phone #, I'll go look in my "god help me" parts boxes for the stuff. If I have it, I'll send some along to you N/C.
When applied, it dries completely leaving only the graphite lube in place.
Let me know and I'll see if I can find it...
Bob.