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Old 11-15-2002, 07:14 AM
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Post C6 help needed

There are 2 vacuum pipes coming from my C6.1 goes to the rear of the inlet manifold.Where does the other go? ( 460 motor)
Cheers Daz

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Old 11-15-2002, 01:07 PM
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Do you mean the vacuum ports on the modulator valve? Do you know about what year trans it is?
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Old 11-15-2002, 01:26 PM
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Oooooh I think I know what you have there, back in the late seventies or thereabouts some Ford trannies had a modulator valve that had two ports. They were meant to be used with one line going to manifold vacuum and the other to ported vacuum (above the throttle plate). I think the reasoning was it made the trans more responsive to actual load, I do believe the trick is to get a modulator with a single port and swap it out. I think these came on some larger trucks and motorhomes, it reduced hunting shifts where the load could vary widely between full load and none.

For high performance toss it and get the single port modulator and try to get one that has the hollow setscrew in the port, you can crank that screw in or out and raise or lower you shift points (increase firmness too). Any C6 modulator will fit I believe but don't quote me (Ford changes designs as often as I change diapers around here! :p ).
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Old 11-15-2002, 01:58 PM
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Red face

...you stole my thunder 4Jaw...



That's what I was trying to get at. Someone has removed the ported vacuum signal. His type is held in with a bracket...the single is a screw-in. I would just keep it as is with a nipple on the ported port to keep road dirt out.

Damn you are sharp at times...

[ November 15, 2002: Message edited by: KULTULZ ]</p>
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Old 11-15-2002, 02:49 PM
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Thanks for the info guys.
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