A-904 Throttle Pressure Adjustment

You want to set your kickdown at wide open throttle, not idle. You also may need the Mopar throttle adapter to get proper throttle and K/D geometry.
No I gotcha on that, but let's say with no linkage connected and the kickdown pulled all the way forward as if you were not on the throttle at all, if you drive it like that would that make it slip going into third gear?
I guess what I'm asking is does that kick down lever being pushed back hold some kind of extra pressure for when it goes into third at a high RPM out of second?