TH350 vacuum? - Third Generation F-Body Message Boards

Cuno · 07-29-2002, 08:17 PM

I am installing a TH350. The question I have, is where should I connect the vacuum line? The carb? Another question is does the vacuum determine the shift points on this tranny? If so, is there a way to modify the shift points if I need to?

AlkyIROC · 07-29-2002, 08:51 PM

It needs to go to manifold vacuum. You modify the shift points with the vacuum modulator. You'll need an adjustable one.

IHI · 07-29-2002, 11:46 PM

Stephen, do you know of anyone that's had luck with adjustable module. I've only seen the one on my friends chevelle and it just plain doesn't work-screwed in or out, nothing changes. It'd be great for bracket racing if it did though.

AlkyIROC · 07-29-2002, 11:49 PM

When I used a TH350 I never used a modulator valve. I doubt you could get it to shift at the same place every time. I manually shifted each gear.