proportion valve - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Greubin · 03-07-2011, 11:20 PM

Any suggestions where I could purchase a disc brake proportion valve for my '71 c20? I tried the local NAPA, Kragens, etc. I know LMC has them, but they're like $140.00..

I recently replaced my master cylinder, but fluid is still transferring from the rear reservoir to the front. So I suspect the proportion valve is leaking.

Thanks!

chipflyer · 03-08-2011, 12:15 AM

I had the same problem after buying a new master cylinder from advance auto. Like you, I suspected the prop valve and bought a known good one and it made no difference, Its a fairly simple device that doesn't often fail. Bought a remanufactured master cyl from Napa and that solved my problem. Some of the new parts that are made overseas are junk, I would try another Master Cylinder, preferably a reman.
Good luck

Jeff

mstrav1973 · 03-08-2011, 12:56 AM

cpp has a nice master cylinder / proportioning valve for pretty cheap and it looks nice.

Matt

murry11 · 03-08-2011, 01:24 AM

www.getdiscbrakes.com
Thats where I got mine at. Master cyl,bosster and valve.

*stich626* · 03-08-2011, 01:47 AM

junk yard
73-87 truck

03-07-2011, 11:20 PM	#1
Greubin Registered User Join Date: Dec 2005 Location: SJC Posts: 158	proportion valve Any suggestions where I could purchase a disc brake proportion valve for my '71 c20? I tried the local NAPA, Kragens, etc. I know LMC has them, but they're like $140.00.. I recently replaced my master cylinder, but fluid is still transferring from the rear reservoir to the front. So I suspect the proportion valve is leaking. Thanks! __________________ ___________ Greubin '71 C20 custom - GM Crate 350CI/290HP, BTO 700R4 level II, Qjet, and HEI

03-08-2011, 12:15 AM	#2
chipflyer Registered User Join Date: May 2004 Location: Topeka, Ks Posts: 2,293	Re: proportion valve I had the same problem after buying a new master cylinder from advance auto. Like you, I suspected the prop valve and bought a known good one and it made no difference, Its a fairly simple device that doesn't often fail. Bought a remanufactured master cyl from Napa and that solved my problem. Some of the new parts that are made overseas are junk, I would try another Master Cylinder, preferably a reman. Good luck Jeff __________________ I'm not a pessimist, I'm just optimistic that bad things are going to happen. 1971 Cheyenne Super K10 - tilt, cruise, air, am/fm, tow hooks, factory buckets! 1986 Jeep J10 pickup, - 5.3L Vortec with 4L60e and NP241.

03-08-2011, 12:56 AM	#3
mstrav1973 Registered User Join Date: Oct 2008 Location: Meridian, Idaho Posts: 321	Re: proportion valve cpp has a nice master cylinder / proportioning valve for pretty cheap and it looks nice. Matt __________________ 72 chevy k-10, swb, auto, 35's, rally's, posi, 4" lift, 2.5" old style 40 series flows with headers and crossover pipe and some other stuff!!

03-08-2011, 01:24 AM	#4
murry11 Registered User Join Date: Dec 2010 Location: camrose alberta Posts: 21	Re: proportion valve www.getdiscbrakes.com Thats where I got mine at. Master cyl,bosster and valve.

03-08-2011, 01:47 AM	#5
stich626 Account Suspended Join Date: Sep 2010 Location: hingham ma Posts: 1,721	Re: proportion valve junk yard 73-87 truck



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