Disc/Disc proportioning valve! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Andy4639 · 03-21-2016, 08:31 AM

Went to the Run to the Sun show this weekend and while there my proportioning valve I got with the CCP rear disc brake kit failed! Imagine that.
I got another one from a vendor that didn't have the plunger on the front side like CCP's did.

From what I have found you don't need it and it's what failed on mine. It was squirting brake fluid out of it every time you put on the brakes. The seal failed!
I also talked to several vendor's and fellow car guy's who I trust and they all said if your running rear disc and the rear lock up before the front is the only time to use the adjustable valve. Mine does not.
According to the vendor I bought the proportioning valve from it's a straight through valve. No need for the adjuster.

One more note:
Has anyone had the gasket for the master cylinder to shrink and start leaking? This is a Chrome aftermarket one.

CCP

GM

03-21-2016, 08:31 AM	#1
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Disc/Disc proportioning valve! Went to the Run to the Sun show this weekend and while there my proportioning valve I got with the CCP rear disc brake kit failed! Imagine that. I got another one from a vendor that didn't have the plunger on the front side like CCP's did. From what I have found you don't need it and it's what failed on mine. It was squirting brake fluid out of it every time you put on the brakes. The seal failed! I also talked to several vendor's and fellow car guy's who I trust and they all said if your running rear disc and the rear lock up before the front is the only time to use the adjustable valve. Mine does not. According to the vendor I bought the proportioning valve from it's a straight through valve. No need for the adjuster. One more note: Has anyone had the gasket for the master cylinder to shrink and start leaking? This is a Chrome aftermarket one. CCP GM __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.



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