Ported or manifold vac for overdrive bypass vac switch?

Liams55belvedere said

There is a kickdown cable but again I don't really know much about this so I don't know if that answers your question.

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What we are asking is what makes your OD and Lockup engage and disengage?

Is it simply switched, or is there some sort of automatic control over those two functions?

So far it kinda sounds like you don’t know yet.