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04-27-2014, 05:25 PM
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#1 |
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Senior Member
 
Join Date: Dec 2001
Location: Lexington,NC
Posts: 503
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700r4 lockup
I have TCI lockup wiring on my truck with the vacuum switch that uses brake switch. It is teed into the same line as vacuum advance for HEI dizzy. Should this be on separate vacuum source?
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68  C-10 Custom LWB307 V8 Lexington,NC davideowens@lexcominc.net God Bless America |
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04-27-2014, 07:08 PM
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#2 |
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Registered User
Join Date: Oct 2008
Location: Marianna Arkansas
Posts: 7,279
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Re: 700r4 lockup
Yes, it really should have its own vacuum source and of the manifold type if I remember. Jim
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04-27-2014, 10:55 PM
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#3 |
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Senior Member
Join Date: Dec 2001
Location: Lexington,NC
Posts: 503
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Re: 700r4 lockup
ttt
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68 C-10 Custom LWB307 V8 Lexington,NC davideowens@lexcominc.net God Bless America |
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04-27-2014, 11:13 PM
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#4 |
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Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: 700r4 lockup
Since I was curious I did some looking and found this thread.
http://67-72chevytrucks.com/vboard/s...d.php?t=476777 TCI's page http://www.tciauto.com/tc/2004r-700r...iring-kithtml/ "Connect the vacuum switch to a ported vacuum source on the carburetor or throttle body. (If you find that the TCC operation is erratic in your application, then you may try moving the vacuum source to the manifold.)" Instructions, good reading.
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04-28-2014, 03:11 AM
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#5 |
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Senior Member
Join Date: Dec 2001
Location: Lexington,NC
Posts: 503
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Re: 700r4 lockup
Thanks for the info, guys. I'm at work and just got a chance to get on the board. I didn't know if it would affect anything by being hooked up like that, it is running and shifting good. The shop that rebuilt my tranny hooked it up like this. I figured they know more about it than I do.
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68 C-10 Custom LWB307 V8 Lexington,NC davideowens@lexcominc.net God Bless America |
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04-28-2014, 07:18 AM
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#6 |
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Registered User
Join Date: Feb 2012
Location: Ruskin Florida
Posts: 4,566
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Re: 700r4 lockup
I hooked mine to a separate source. You have to adjust the switch a little.
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04-28-2014, 07:30 AM
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#7 |
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Registered User
Join Date: May 2013
Location: WEST PALM FLORIDA
Posts: 1,174
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Re: 700r4 lockup
alot of times the vacuum port for the distributor is timed , meaning it does not pull from idle to a certain point
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