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#1 |
Registered User
Join Date: Aug 2002
Location: Muskogee, Oklahoma
Posts: 2,914
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Proportioning valve, where to buy?
My bro in law thinks my brake problem lies with a faulty proportioning valve, so where in the heck can I get a new one? I have searched all the major parts stores and all they carry are aftermarket ones? Mine is a stock valve from a 1971 w/power brakes.
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#2 |
Grandpa in the rustmobile...
Join Date: Nov 2008
Location: Spokane WA/Viola TN
Posts: 11,422
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Re: Proportioning valve, where to buy?
ECE
aftermarkets lots cheaper though im running a brass disc/drum one from speedway
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John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4 |
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#3 |
Registered User
Join Date: Aug 2002
Location: Muskogee, Oklahoma
Posts: 2,914
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Re: Proportioning valve, where to buy?
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#4 |
Grandpa in the rustmobile...
Join Date: Nov 2008
Location: Spokane WA/Viola TN
Posts: 11,422
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Re: Proportioning valve, where to buy?
I believe so.
I redid all of mine...PM lolife99 he will know
__________________
John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4 |
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#5 |
Registered User
Join Date: Mar 2001
Location: Paradise TX USA
Posts: 1,200
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Re: Proportioning valve, where to buy?
I bought an OEM replacement valve from Early Classic enterprises. It fits and works perfectly http://www.earlyclassic.com/catalog.aspx
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"Negative people always seem to have a problem for every solution" |
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#6 |
Registered User
![]() Join Date: Jan 2008
Location: St.Petersburg,Fl
Posts: 1,267
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Re: Proportioning valve, where to buy?
ECE is the best!
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#7 | |
Registered User
Join Date: Aug 2002
Location: Muskogee, Oklahoma
Posts: 2,914
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Re: Proportioning valve, where to buy?
Quote:
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#8 |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,698
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Re: Proportioning valve, where to buy?
ECE.
They have a stock appearing Prop. valve.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#9 |
Registered User
Join Date: Jul 2010
Location: Arlington,Tx
Posts: 103
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Re: Proportioning valve, where to buy?
i got mine from performance online at a good price.
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#10 |
Registered User
Join Date: Aug 2002
Location: Muskogee, Oklahoma
Posts: 2,914
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Re: Proportioning valve, where to buy?
I just need to rule everything else out before I try a new prop. valve, I have installed a new master cylinder, all new brake lines front to back, new brake pads, bled lines repeatedly, have went through 3 large brake fluid bottles. I have a firm pedal and the truck will stop, but I cannot make the brakes lock up even on grass or gravel? Any ideas?
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#11 |
Registered User
Join Date: Mar 2011
Location: Chesapeake, VA
Posts: 578
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Re: Proportioning valve, where to buy?
What about the rubber one in the back that tees off to both of the rear brakes? Did you change that one? I've had one of those clog before.
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#12 |
Registered User
Join Date: Aug 2002
Location: Muskogee, Oklahoma
Posts: 2,914
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Re: Proportioning valve, where to buy?
Yep, I have replaced all the lines on the truck including that one with brand new lines. I had better brakes on this truck before I rebuilt it when I only had front brakes. I did some more looking and i'm thinking the booster may have a leak now, I can pull the vacuum hose while it's running and the engine sounds the same, but if I block off the hose the engine rpm's drop. I'm going to change the booster next and go from there.
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#13 |
Registered User
Join Date: Mar 2011
Location: Chesapeake, VA
Posts: 578
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Re: Proportioning valve, where to buy?
I was going to suggest the booster first but you said the pedal was firm so i didn't say anything. Sounds like you may have a leak. I would probably go for the booster next before the prop valve. If the rubber ones weren't clogged, the prop valve probably isn't clogged. Just my $.02.
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#14 | |
Registered User
Join Date: Aug 2002
Location: Muskogee, Oklahoma
Posts: 2,914
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Re: Proportioning valve, where to buy?
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#15 |
Registered User
Join Date: Mar 2011
Location: Chesapeake, VA
Posts: 578
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Re: Proportioning valve, where to buy?
What about the wheel cylinders in the back? Have you verified they move? I've had them freeze on me before. Just trying to throw options out there.
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#16 |
Registered User
Join Date: Oct 2010
Location: Wallingford CT
Posts: 260
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Re: Proportioning valve, where to buy?
So I too am having trouble with my brakes in my 71 only my problem is that I have mostly back brakes. If I try a quick stop the backs instantly lock up the nose doesn't even drop a little. Very tough to drive in the rain, I was thinking it was the prop. valve . Any help would be great.
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#17 |
Registered User
Join Date: Aug 2002
Location: Muskogee, Oklahoma
Posts: 2,914
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Re: Proportioning valve, where to buy?
Yeah, I jacked the back up and spun them while a friend hit the brakes. They are working. I even manually adjusted them until they were grabbing then backed them off just until the wheel would spin. I'm at a loss guys, I replaced the valve that goes to the brake booster and it seemed to help but it still seems like the power in my power brakes is lacking. I've got alot of vacuum when I cover the hose with my finger, i'm pretty sure my booster is shot. I'm going to find another booster that I know to be working and try it.
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