Or, really cool, would be an electric vss controlled way to pull the TV cable. Something like used to move the throttle on electronic cruise control. Given all that it needs is input and output signals it should be doable, and not prone to slipping TV cable issues.
If the TV cable is installed correctly, it will stay put. Also, if it does happen to move too far out of adjustment, it will change the shift characteristics, letting you know to fix it before you smoke it.
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