Hello.

Trying to learn the REALITY of the TV cable operation and the precision and importance of its adjustment, I read "the cable must push progressively the TV valve at all throttle positions."

On the first 1/3 of cable travel, the cable pulls the cam towards contacting the TV valve. Only at the last 2/3 of travel the valve is pushed in by the cam.

At the first third of travel there is no action at all; the pull is against the cam spring. Later yes, the pull is against the plunger spring.
This scheme does NOT correspond to a continuous control of the TV plunger by the throttle plate, as pictured at the END of this nice site:

http://www.iotech.no/corvette/technical/700r4/

Is that the way it is supposed to be?

Or the zero throttle position is supposed to be at the position where the cam just contacts the plunger? -With NO cam spring slack- ?

Can a disconnected TV cable harm the transmission; or what are the downsides ?

(This is not about cable adjusting procedures, the proper procedure tells WOT to maximum pull, -fine-)

If anyone can suggest a site where to LEARN about GM 4L60 innerworking basics, please post. I have read about the pressure levels at different gears and its influence on shiftpoints; but nowhere there is a CLEAR relation between pressure being higher DELAYS upshifting or the opposite; heavier governor weights delaying upshifting or the opposite; stiffer governor springs delaying upshifting or the opposite; TV plunger REAL interaction with upshifting, etc.

Thanks,
Mick