TH350 vacuum?
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From: Iowa
TH350 vacuum?
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?
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Joined: Jul 1999
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
It needs to go to manifold vacuum. You modify the shift points with the vacuum modulator. You'll need an adjustable one.
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From: Waterloo, Iowa
Car: 86 firebird with 98 firebird interi
Engine: pump gas 427sbc Dart Lil M 13.5:1
Transmission: Oldani TH400 w/ BTE 9" convertor
Axle/Gears: 31 spline Moser/full spool/4.11Rich
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.
Moderator
Joined: Jul 1999
Posts: 17,262
Likes: 168
From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
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.
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