Brake Proportioning Valves - The 1947 - Present Chevrolet & GMC Truck Message Board Network

RON WOODGEARD · 07-21-2002, 07:36 PM

I'm done with the lowering and front disc conversion BUT.. I didn't consider the bias valve, After bleeding the system I don't have any rear brakes compared to the front, is that due to the proportioning valve ?
I have new rear shoes and adjusted them.

RON

Longhorn Man · 07-21-2002, 08:41 PM

Did you replace the old drum junction valve with a disck/drum prop valve?
Actually, the rear drums would lock up first if you didn't...hmmmm
TTT then.

nu2-72 · 07-21-2002, 09:39 PM

A dick/drum valve and a brill? Where you been shopping?

XXL · 07-21-2002, 09:46 PM

You may need a prop valve... but you also need to replace your front lines with smaller ones (1/4" I think... whatever is 1 smaller than what's on the rear). Without it, you get monster front brakes and nothing left in the rear-- good for standing your truck on it's front bumper but...

Kenneth

Longhorn Man · 07-21-2002, 10:45 PM

Ouch...that's twice with that typo...thanks, it was fixed.

RON WOODGEARD · 07-22-2002, 02:56 AM

NO, I didn't change anything on the brake system except went to front disc. conversion kit. (you would have thought they would have everything that was needed in the swap kit) I'll call "TUCKERS IN VEGAS" tomorrow.
Thanks for everyones replies...........

RON

Longhorn Man · 07-22-2002, 07:20 AM

You should swap out master cylinders and prop valves, and see what that does.

TERRYP · 07-22-2002, 02:34 PM

Don't screw with the brake lines, makes no difference, just the valve is all you should add, with a proper dual master cylinder.

RON WOODGEARD · 07-22-2002, 05:25 PM

I touched bases with "TUCKERS" and they said the proportioning valve doesn't come with the conversion kit but it is needed.

an additional $89.95.

OH WELL, whatever it takes......

THANKS TO YOU ALL !!!!!!

RON

07-21-2002, 07:36 PM	#1
RON WOODGEARD Resident Young Old Dude ! Join Date: Jul 2001 Location: Nevada Posts: 1,948	Brake Proportioning Valves I'm done with the lowering and front disc conversion BUT.. I didn't consider the bias valve, After bleeding the system I don't have any rear brakes compared to the front, is that due to the proportioning valve ? I have new rear shoes and adjusted them. RON

07-21-2002, 08:41 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Did you replace the old drum junction valve with a disck/drum prop valve? Actually, the rear drums would lock up first if you didn't...hmmmm TTT then. Last edited by Longhorn Man; 07-21-2002 at 10:45 PM.

07-21-2002, 09:39 PM	#3
nu2-72 Senior Member Join Date: Apr 2001 Location: Amazonia, Mo. USA Posts: 2,821	A dick/drum valve and a brill? Where you been shopping? __________________ 72 3/4 4x4 350 4spd 72 3/4 4x4 350 auto 2004 Duramax Silverado 4x4 2006 Duramax Crew cab 4x4 2010 Harley Ultra Limited 2011 Harley Street Glide

07-21-2002, 09:46 PM	#4
XXL Señor Member Join Date: May 2002 Location: Edge of the world Posts: 5,367	You may need a prop valve... but you also need to replace your front lines with smaller ones (1/4" I think... whatever is 1 smaller than what's on the rear). Without it, you get monster front brakes and nothing left in the rear-- good for standing your truck on it's front bumper but... Kenneth __________________ Craigslist \| ebay \| Engrishtees \| www.myattitudesucks.com \| Follow me on Twitter

07-22-2002, 02:34 PM	#8
TERRYP GYRO GEARLOOSE Join Date: Jun 2000 Location: Nevada City, CAEverett, WA Posts: 361	Don't screw with the brake lines, makes no difference, just the valve is all you should add, with a proper dual master cylinder. __________________ Nevada City, CA Everett, Washington 57 3/4 rat, 235, 3spd 66 C-10 Panel, SWB. 350 from '68, 200R4 tranny, 3.07 rear ratio, restoring 68 C10 LWB 350 4spd, 4.56 rear dump runner 82 Camaro, 305, THM-200-R4 84 Monte Carlo 305 TH350, land tuna 85 Tercel SW, snow runner DISGRACED OUTLAW MEMBER OF THE DRUM BRAKE CLUB

07-21-2002, 10:45 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Ouch...that's twice with that typo...thanks, it was fixed.

07-22-2002, 02:56 AM	#6
RON WOODGEARD Resident Young Old Dude ! Join Date: Jul 2001 Location: Nevada Posts: 1,948	NO, I didn't change anything on the brake system except went to front disc. conversion kit. (you would have thought they would have everything that was needed in the swap kit) I'll call "TUCKERS IN VEGAS" tomorrow. Thanks for everyones replies........... RON

07-22-2002, 07:20 AM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	You should swap out master cylinders and prop valves, and see what that does.

07-22-2002, 05:25 PM	#9
RON WOODGEARD Resident Young Old Dude ! Join Date: Jul 2001 Location: Nevada Posts: 1,948	I touched bases with "TUCKERS" and they said the proportioning valve doesn't come with the conversion kit but it is needed. an additional $89.95. OH WELL, whatever it takes...... THANKS TO YOU ALL !!!!!! RON



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