Brake Problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Bowed · 04-27-2006, 02:42 PM

This is a 1973 C20 that I picked up recently . The front discs apply but the rear drums free wheel with the brake pedal hitting the floor . I replaced the master cylinder and bled the entire system but it is still the same . I have not removed the rear drums ( full floater/ tough ) because I am now thinking that it's the combination valve . How should I trouble shoot at this point ? how do you test a combination valve . Thanks .

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04-27-2006, 02:42 PM	#1
Bowed Registered User Join Date: Oct 2002 Location: where it's hot Posts: 1,059	Brake Problem This is a 1973 C20 that I picked up recently . The front discs apply but the rear drums free wheel with the brake pedal hitting the floor . I replaced the master cylinder and bled the entire system but it is still the same . I have not removed the rear drums ( full floater/ tough ) because I am now thinking that it's the combination valve . How should I trouble shoot at this point ? how do you test a combination valve . Thanks . .



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