Question about Proportional Valves - The 1947 - Present Chevrolet & GMC Truck Message Board Network

myoldchevytruck · 05-16-2008, 03:17 PM

I've swap to disk brakes in the front and I'm wondering if anyone knows if other/later years proportional Valves will work. My disk setup is from a 71/72 truck. I was thinking of going to the boneyard and seeing if there's any early model vans, 73-87 trucks or even the early model Silverado's (90's). Or are we specific to the 71'/72' parts. Thanks.

chris71 · 05-16-2008, 04:01 PM

not a brake expert, but i think that the gm prop valve is pretty universal given the fact that they are all off of front disc rear drum vehichles, stay away from 4 wheel drum (dont have a prop valve)and 4 wheel disc vehichles (different), i personally would feel comfortable using a 73-87 prop valve, and would probably stay away from the newer prop valves, make sure to stay away from anything with abs. i just picked up a new universal GM prop valve for $60 at a swap meet from one of the bigger brake companies

Sammy · 05-16-2008, 04:03 PM

Different years may work a long as U keep front disk P valve only donor. Another thing to consider is the hard line hookup from master & front/ rear supply lines. Remember your talking brakes keep safety in mind.

05-16-2008, 03:17 PM	#1
myoldchevytruck Retired Air Force Veteran Join Date: Aug 2007 Location: Pembroke Pines, Florida 33024 Posts: 1,808	Question about Proportional Valves I've swap to disk brakes in the front and I'm wondering if anyone knows if other/later years proportional Valves will work. My disk setup is from a 71/72 truck. I was thinking of going to the boneyard and seeing if there's any early model vans, 73-87 trucks or even the early model Silverado's (90's). Or are we specific to the 71'/72' parts. Thanks. __________________ Harry 69' SWB Step Side 1/2 Ton w/68' Front Clip Swap from Leafs to Trailing Arms (Complete) Swap 6 Lug to 5 Lug (w/ Disk Brakes in Front) 3/6 Drop Help Support The Board Click Here For Information On How To Subscribe Krue's FAQ Page Vendors

05-16-2008, 04:01 PM	#2
chris71 Registered User Join Date: Oct 2007 Location: Sykesville MD Posts: 357	Re: Question about Proportional Valves not a brake expert, but i think that the gm prop valve is pretty universal given the fact that they are all off of front disc rear drum vehichles, stay away from 4 wheel drum (dont have a prop valve)and 4 wheel disc vehichles (different), i personally would feel comfortable using a 73-87 prop valve, and would probably stay away from the newer prop valves, make sure to stay away from anything with abs. i just picked up a new universal GM prop valve for $60 at a swap meet from one of the bigger brake companies __________________ '55 3100 2nd series short-bed stepside '70 Corvette coupe stingray '71 Chevelle 2-dr coupe SS clone '71 C10 long-bed fleetside '83 long-haired brunette wife

05-16-2008, 04:03 PM	#3
Sammy Registered User Join Date: Apr 2000 Location: Bonne Terre, Mo Posts: 3,005	Re: Question about Proportional Valves Different years may work a long as U keep front disk P valve only donor. Another thing to consider is the hard line hookup from master & front/ rear supply lines. Remember your talking brakes keep safety in mind. __________________ '69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629"



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.