th400 vacuum source for modulator on th400
Thread Starter
Registered User
Joined: Dec 2008
Posts: 2
Likes: 0
th400 vacuum source for modulator on th400 I am buttoning up my 2005 LQ4 swap into my jeep scrambler and was wondering what source of vacuum on the LQ4 do you guys use to hook up the vacuum modulator on the th400. I searched on here but couldn't find it.
Also thinking of modifying my pedal for the kickdown switch but was reading some use and some don't. Is there any benefit to keeping this switch?
Thanks in advance for any help!
-Will
Also thinking of modifying my pedal for the kickdown switch but was reading some use and some don't. Is there any benefit to keeping this switch?
Thanks in advance for any help!
-Will
Any manifold vacuum source can be used...if you have power brakes plumbed in just T off that line. There probably won't be a dedicated port on the stock intake so you'll need to T off some other line.
I think the kickdown is a good idea personally...it raises the line pressure at WOT. I've run cars without it though for a long time too and didn't have issues.
I think the kickdown is a good idea personally...it raises the line pressure at WOT. I've run cars without it though for a long time too and didn't have issues.
TECH Fanatic
Joined: Jul 2005
Posts: 1,685
Likes: 7
From: Beebe, Arkansas
I am buttoning up my 2005 LQ4 swap into my jeep scrambler and was wondering what source of vacuum on the LQ4 do you guys use to hook up the vacuum modulator on the th400. I searched on here but couldn't find it.
Also thinking of modifying my pedal for the kickdown switch but was reading some use and some don't. Is there any benefit to keeping this switch?
Thanks in advance for any help!
-Will
Also thinking of modifying my pedal for the kickdown switch but was reading some use and some don't. Is there any benefit to keeping this switch?
Thanks in advance for any help!
-Will
If it already has the port than just t into if.
The switch doesnt really matter that much unless you flat floor it. The modulator will control line pressure and the governor will control most of the up and downshifting with input from thr modulator of course.
