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#1 |
Registered User
Join Date: May 2012
Location: Faith,NC
Posts: 1,626
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What size hose is required?
What size hose/line are you running to the (TH400) tranny vacuum modulator? The nipple on my modulator looks like it takes about a 1/8" - 3/16" hose. I wanted to use a 90 degree fitting coming out of my manifold (3/8" NPT - 1/8" or 3/16" nipple but the smallest I have found is 1/4" nipple and only in straight, not 90.
I was considering running a hard line with a short section of rubber on both ends but there is no good place to clamp the line along the way. Thanks, |
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#2 |
Registered User
Join Date: Aug 2012
Location: error 404 location not found
Posts: 816
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Re: What size hose is required?
Factory th350 used hard line with rubber ends from factory, wouldn't doubt th 400 has their own hrs line setup
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1995 s10 blazer 4.3 1967 c10 350/350 fleet short 1993 s10 blazer 4.3l 4l60 RIP 6/20/14 2000 mercury sable Thats a how I roll |
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#3 |
Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,216
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Re: What size hose is required?
They use 1/4 in hose. Usually the factory runs the hard line down along the dipstick tube but I don't remember what side the mod. is on on a 400.
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#4 |
Registered User
Join Date: Aug 2012
Location: error 404 location not found
Posts: 816
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Re: What size hose is required?
I belive its on the passenger side if someone can clarify
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__________________
1995 s10 blazer 4.3 1967 c10 350/350 fleet short 1993 s10 blazer 4.3l 4l60 RIP 6/20/14 2000 mercury sable Thats a how I roll |
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#5 |
Registered User
Join Date: Feb 2012
Location: Mission Viejo, CA
Posts: 1,856
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Re: What size hose is required?
its on the passenger side yes
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#6 |
Registered User
Join Date: May 2012
Location: Faith,NC
Posts: 1,626
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Re: What size hose is required?
Anyone have a pic of how this line is routed? It doesn't seem like there is anywhere to clamp it along the way. JointTech is right, it is on the passenger side.
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#7 |
Senior Member
![]() Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,844
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Re: What size hose is required?
On my 69 3/4 ton with 350 engine and TH-400 the line is steel and is held to the modulator and vacuum "T" with very short rubber hoses. In fact, the "T" end of the steel line is more of a nipple that loosely slides into the "T" with the hose creating the necessary seal function. The line should have a tab welded to it that is attached to one of the top bell housing bolts along with the trans dipstick.
Here's a link for the line made for my truck with a stock intake manifold or aftermarket manifold with the vacuum port in the same location. Interesting that the application is only for 69/70.http://www.getdiscbrakes.com/ttv6905 I'd post some pictures, but the changes made to the forum a couple days ago won't allow me to do so. Last edited by FirstOwner69; 07-20-2013 at 11:00 AM. Reason: Clarified that I have a TH-400 with 350 engine! |
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