bigjeep

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

A_VAS

iTrader: (16)

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.

Bo185

The LQ4 most likely came with hydroboost brakes stock and won't have the port in the back of the intake for the vacuum brakes. If it doen't just buy the port from a dealer and remove the plug and use it.

If it already has the port than just t into if.

topher455

iTrader: (6)

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.