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Question about vacuum modulation!!

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Old Sep 3, 2006 | 09:00 PM
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Default Question about vacuum modulation!!

Hi fellas,

I got the truck up and running finally and it's feeling pretty good especially for the fact that I I have my shorties on and they have a tremendous leak from a split in the collector Anyway I noticed today, while I was doing a little routine check on my pistons, there was tranny fluid inside the intake manifold!! I have the Vacuum line from the tranny T'd into the same line the break master cylinder is on!! Should there be oil in the manifold like that or should I be using a different style T fitting?? I removedthe damn EGR and PCV to eliminate the grunge build up in the intake and now I got this crap going

Thanks
Nick
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Old Sep 4, 2006 | 06:26 PM
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You should not have trans fluid in the intake. In the old days when this happened the modulator diaphram (sp?) was busted allowing fluid to be sucked up with the vaccum. Dunno about the new styles.
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Old Sep 5, 2006 | 11:16 PM
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Damn so you think something is wrong or did I just put too much fluid in it??
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Old Sep 5, 2006 | 11:23 PM
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Even if there is too much fluid you shouldn't be sucking fluid up through the modulator. The vacuum side of the modulator should be sealed from the fluid side. Sounds like you might have a problem with the modulator.
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Old Sep 5, 2006 | 11:27 PM
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Crap, Crap and Tripple CRAP!!!I just got this damn thing back from chuck too. Do you know how hard it is to fix??
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Old Sep 5, 2006 | 11:29 PM
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Well before you take my word for gold, talk to Chuck. I think he'll say the same thing, but I could be wrong.

The vacuum modulator is easy to replace. Drain the fluid, drop the pan, take off two bolts that hold the retainer plate onto the valve body, disconnect the vacuum line, and pull the unit. It's small and should pop right off once the retainer plate is removed. Then reverse to install.
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Old Sep 5, 2006 | 11:31 PM
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NICE!!! You rock dude!! Do you know if it's a huge deal to worry about right now or can it wait a few weeks or s??o
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Old Sep 5, 2006 | 11:38 PM
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I'd say fix it ASAP.....you don't want to suck tranny fluid into the motor. Definitely talk to Chuck and get his advice, but IMO you should fix it as soon as you can.
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