Can anyone id this proportioning valve? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Brad · 11-21-2006, 01:31 AM

This is out of a '67-72' truck, but I don't know what it goes to and whether it would work on my '67. I currently have the prop valve from a '77 down on the crossmember below the radiator and want to move it. Now that I think about it, I might be able to still use it and just use the bracket from this to mount it by the booster. Also, would I be able to media blast this clean again and just blow it out thoroughly before installing? Anyhoo, does anyone know for sure what this is from?

Aarons72s · 11-21-2006, 05:26 AM

ok. That is a 71-72 disc brake proportiong valve. You could media blast it just be sure to plug all the holes with pipe plugs so no sand gets in there.

Aarons72s · 11-21-2006, 05:29 AM

Here is a pic to help you out.

70c10 · 11-21-2006, 07:53 AM

Brad, that looks like the one I cleaned up last night

. Mine came off a 71'. I used a wire wheel on a dremel to knock the rust off before painting.

Americanrider · 11-21-2006, 01:10 PM

Same as this one I pulled from a 71 C-30. The large port hanging off the bottom/rear is for trailer brake lines. More than likely it's from a 3/4 or 1 ton truck.

11-21-2006, 01:31 AM	#1
Brad Out of the carpool lane. Join Date: Jan 2000 Location: Clark Co, WA Posts: 5,673	Can anyone id this proportioning valve? This is out of a '67-72' truck, but I don't know what it goes to and whether it would work on my '67. I currently have the prop valve from a '77 down on the crossmember below the radiator and want to move it. Now that I think about it, I might be able to still use it and just use the bracket from this to mount it by the booster. Also, would I be able to media blast this clean again and just blow it out thoroughly before installing? Anyhoo, does anyone know for sure what this is from? Attached Images __________________ 1968 C-10 SWB, 5.7 Vortec/700R4/3.73 posi, Torch Red 1968 Camaro, 250/Powerglide, all original (No, I'm not gonna drop a 350 in it!...Jeez!) 2000 Honda VFR in the faster yellow! 2008 Husqvarna TE-610 1967 C-10 SWB 'Six Appeal'-Gone but not forgotten...

11-21-2006, 05:26 AM	#2
Aarons72s Registered User Join Date: Apr 2006 Location: oklahoma Posts: 10,670	Re: Can anyone id this proportioning valve? ok. That is a 71-72 disc brake proportiong valve. You could media blast it just be sure to plug all the holes with pipe plugs so no sand gets in there.

11-21-2006, 05:29 AM	#3
Aarons72s Registered User Join Date: Apr 2006 Location: oklahoma Posts: 10,670	Re: Can anyone id this proportioning valve? Here is a pic to help you out. Attached Images

11-21-2006, 07:53 AM	#4
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	Re: Can anyone id this proportioning valve? Brad, that looks like the one I cleaned up last night . Mine came off a 71'. I used a wire wheel on a dremel to knock the rust off before painting. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads Last edited by 70c10; 11-21-2006 at 08:11 AM.

11-21-2006, 01:10 PM	#5
Americanrider Registered User Join Date: Dec 2004 Location: NW, WA. Posts: 1,421	Re: Can anyone id this proportioning valve? Same as this one I pulled from a 71 C-30. The large port hanging off the bottom/rear is for trailer brake lines. More than likely it's from a 3/4 or 1 ton truck. Attached Images Last edited by Americanrider; 11-21-2006 at 01:11 PM.

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