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Labor Day Putting down your wrenches or time for
MORE wrenching? 
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: May 2005 Posts: 96 Shop Shark | | Shop Shark Joined: May 2005 Posts: 96 | Hi, I bought a proportioning valve and booster from Jim Carter. Does anybody knows where the frontbrakes are connected to ? There is 1 bigger connection at the front of the valve and 1 smaller at the underside of the valve. I guess it is the connection that’s length wise of the valve ?? http://www.oldchevytrucks.biz/47_55/full.asp?page=56Thanks Jan | | | | | Joined: Apr 2005 Posts: 2,097 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,097 | The larger connector (1/4")is for the rear. The two smaller (3/16")are for the front.
Fred
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine
| | | | | Joined: May 2005 Posts: 96 Shop Shark | | Shop Shark Joined: May 2005 Posts: 96 | Thanks,
The large one is to the front, the smaller 3/16 in on the side and only 1 connection.
Thanks
Jan | | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | Picture?
The ones I'm familiar with have 5 total ports.
One on the back center goes to the rear axle.
Two on the side/top are inlets from master cylinder.
Two at about 45 degree angle on the front are for the fronts.
Grigg | | | | | Joined: Jan 2008 Posts: 159 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 159 | Picture?
The ones I'm familiar with have 5 total ports.
One on the back center goes to the rear axle.
Two on the side/top are inlets from master cylinder.
Two at about 45 degree angle on the front are for the fronts.
Grigg Thats the kind I am using on my 37 GMC and that is how it is hooked up, but what is the wire for, is it the brake light switch and if it is how does it hook up to brake lights
1938 Gmc 1/2 ton
| | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | I understand the wire is for an idiot light on the dash, to show if one side lost fluid.
I have not used it.
Grigg | | | | | Joined: May 2005 Posts: 96 Shop Shark | | Shop Shark Joined: May 2005 Posts: 96 | I found a drawing, thanks,
Jan | | |
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