TH 350 modulator line ... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*Shane* · 12-31-2006, 02:47 PM

I was wondering if someone could take a pic of the ORIGINAL modulator line for the TH 350 tranny and a 350 engine and point me in the direction of which end is which. Funny as that sounds, I purchased a new stainless line and damn if I can figure out how this thing routes.

The truck had a solid rubber line (previous owner) from engine to tranny , so I have nothing for reference in regards to a hard line and its routing.

Thanks guys.

JimKshortstep4x4 · 12-31-2006, 03:16 PM

Here is a pic of the modulator line routing. Hopefully it is what you need to see.

Jim

*Shane* · 12-31-2006, 03:32 PM

perfect! Thank You!

Do you happen to have a pic of where it connects to the intake / carb?

JimKshortstep4x4 · 12-31-2006, 03:54 PM

The vacuum line from the modulator connects to the vacuum tree on the rear of the intake manifold. Here is a pic.

Jim

*Shane* · 12-31-2006, 03:58 PM

Thanks!

abbysam1 · 12-31-2006, 04:36 PM

Jim,

What do the other 2 lines, running off the manifold vacuum in your second picture, terminate?

Thanks,
Randy

**RPOZ11** · 12-31-2006, 05:53 PM

Excellent JIM!

JimKshortstep4x4 · 12-31-2006, 07:15 PM

The larger vacuum line goes to the brake booster and the smaller one goes to the AC controls.

Jim

abbysam1 · 12-31-2006, 07:56 PM

Thanks.

Randy

12-31-2006, 02:47 PM	#1
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	TH 350 modulator line ... I was wondering if someone could take a pic of the ORIGINAL modulator line for the TH 350 tranny and a 350 engine and point me in the direction of which end is which. Funny as that sounds, I purchased a new stainless line and damn if I can figure out how this thing routes. The truck had a solid rubber line (previous owner) from engine to tranny , so I have nothing for reference in regards to a hard line and its routing. Thanks guys. Last edited by Shane; 12-31-2006 at 02:48 PM.

12-31-2006, 03:16 PM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: TH 350 modulator line ... Here is a pic of the modulator line routing. Hopefully it is what you need to see. Jim Attached Images

12-31-2006, 03:32 PM	#3
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	Re: TH 350 modulator line ... perfect! Thank You! Do you happen to have a pic of where it connects to the intake / carb? Last edited by Shane; 12-31-2006 at 03:32 PM.

12-31-2006, 03:54 PM	#4
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: TH 350 modulator line ... The vacuum line from the modulator connects to the vacuum tree on the rear of the intake manifold. Here is a pic. Jim Attached Images

12-31-2006, 03:58 PM	#5
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	Re: TH 350 modulator line ... Thanks!

12-31-2006, 04:36 PM	#6
abbysam1 Registered User Join Date: Dec 2006 Location: O'Fallon, IL Posts: 18	Re: TH 350 modulator line ... Jim, What do the other 2 lines, running off the manifold vacuum in your second picture, terminate? Thanks, Randy __________________ 1972 Cheyenne C-20 Currrently being painted 1972 Custom C-10 My daily driver

12-31-2006, 05:53 PM	#7
RPOZ11 72 BB C30 Super LongHorn Join Date: Nov 2002 Location: Chavez Ravine Posts: 1,606	Re: TH 350 modulator line ... Excellent JIM! __________________ 72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS Last edited by RPOZ11; 12-31-2006 at 05:55 PM.

12-31-2006, 07:15 PM	#8
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: TH 350 modulator line ... The larger vacuum line goes to the brake booster and the smaller one goes to the AC controls. Jim

12-31-2006, 07:56 PM	#9
abbysam1 Registered User Join Date: Dec 2006 Location: O'Fallon, IL Posts: 18	Re: TH 350 modulator line ... Thanks. Randy __________________ 1972 Cheyenne C-20 Currrently being painted 1972 Custom C-10 My daily driver



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