Proportioning Valve and brake lines - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ksbeatty · 02-01-2009, 06:46 PM

Is the proportioning valve for drum brakes prior to 1971 all the same? Also I have a 1970 3/4 ton 4x4 with power brakes and does the brake lines from the valve down run inside or outside of the frame? If you have pictures that would be great.

**El Jay** · 02-01-2009, 07:02 PM

Can't help you on the valve.

But the brake line to the rear brakes runs down the inside of the right frame rail.

ksbeatty · 02-01-2009, 07:50 PM

Thanks for the info. I need to really know where the ones from the p-valve. I think one goes one the outside and one on the inside.

**El Jay** · 02-01-2009, 08:02 PM

They drop down to the rear of the front cross member.

02-01-2009, 06:46 PM	#1
ksbeatty Registered User Join Date: Mar 2006 Location: Kansas Posts: 300	Proportioning Valve and brake lines Is the proportioning valve for drum brakes prior to 1971 all the same? Also I have a 1970 3/4 ton 4x4 with power brakes and does the brake lines from the valve down run inside or outside of the frame? If you have pictures that would be great. __________________ 1969 GMC 3/4 Ton 4x4 2" Lift, A/C, PS, PB 383 Stroker, 700R4, 205, 4.10 GM Medium Bronze (Copper Poly) no new nick name yet. She is to pretty to be the Beater. http://67-72chevytrucks.com/vboard/s...d.php?t=241855

02-01-2009, 07:02 PM	#2
El Jay Gone to greener pastures Join Date: May 2007 Location: Gateway to the Delta Posts: 7,354	Re: Proportioning Valve and brake lines Can't help you on the valve. But the brake line to the rear brakes runs down the inside of the right frame rail. __________________ '69 Chevy 1/2 T LWB Stepper: Daily Beater '72 GMC 3/4 T Fleet: Another Daily Beater '72 Plymouth Gran Coupe: ? "Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche "Never kick a fresh turd on a hot day." Harry S. Truman GUN CONTROL: Never having to say, "I missed you." Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck

02-01-2009, 07:50 PM	#3
ksbeatty Registered User Join Date: Mar 2006 Location: Kansas Posts: 300	Re: Proportioning Valve and brake lines Thanks for the info. I need to really know where the ones from the p-valve. I think one goes one the outside and one on the inside. __________________ 1969 GMC 3/4 Ton 4x4 2" Lift, A/C, PS, PB 383 Stroker, 700R4, 205, 4.10 GM Medium Bronze (Copper Poly) no new nick name yet. She is to pretty to be the Beater. http://67-72chevytrucks.com/vboard/s...d.php?t=241855

02-01-2009, 08:02 PM	#4
El Jay Gone to greener pastures Join Date: May 2007 Location: Gateway to the Delta Posts: 7,354	Re: Proportioning Valve and brake lines They drop down to the rear of the front cross member. __________________ '69 Chevy 1/2 T LWB Stepper: Daily Beater '72 GMC 3/4 T Fleet: Another Daily Beater '72 Plymouth Gran Coupe: ? "Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche "Never kick a fresh turd on a hot day." Harry S. Truman GUN CONTROL: Never having to say, "I missed you." Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck

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