Originally Posted by Canzus
Change all your brake hoses, sounds like a classic hose coming apart on the inside, acting as a check valve
Those hoses were new last brake job but hey, they are not made in the USA any longer so who knows...
Also, what is the theory of operation behind the proportioning valve mounted on a disk/drum system anyway ??
I need to clear that one up.
I see a block on this old girl but, is it a distribution block, or really a proportioning valve I wonder...
How would I tell without dissembling it?