I recently disconnected my vacuum lines from my carb to the vac. modulator on my C4 trans to rebuild my carb. Being the dummy that I am, I forgot to mark which vac line goes where ? I looked in all of my rep. manuals and couldn't find the proper hook up. Can someone tell me which vac. line goes where, on the two lines going to the trans vacuum modulator? I know one is manifold (bellow the throttle plate and one is power (above the throttle plate). thanks

 

I've only seen one line hooked to the modulators which was manifold vacuum.

 

most that I've seen were also only one line hook-up, but my modulator has two lines connected to it. right now I've got the most rear nipple of the modulator connected to manifold and the other to port. I think thats how it was and the bronco seems to be shifting ok for now.

 

We learn something every day, now if I could just remember all that stuff!