I was wondering about the detail of how the vac modulator and the electric kickdown interact;
- with the vacuum connected and the elec. kickdown not, will it still kickdown when at low vacuum? Or is the function of the modulator just to hold it in a specific gear longer when accelerating and has no kickdown function?
- my kickdown may be misadjusted to engage the 12V too early (home made unit). Will it 'fight' with the modulator? It seems to kickdown to 2nd then shift up to 3rd. then kickdown then shift up... seems to be in a conflict. It also stays in 1st. for what seems like a long time, say till 4500 rpm or so.
PS I have the vacuum connected to a port on the manifold and its a quite stock engine so should be producing good vacuum...
Thanks.

So I disconnected the kickdown switch and it stays in gear, once its shifted into it, forever. Won't kickdown just using the modulator only. Does this sound right?

A real simple explanation is that the modulator will slightly change shift quality. The governor will change shift points. The kickdown must be hookep up to allow downshifts to occur correctly.

Thanks Steve