Brakes - questions

[53lowdown]

Originally Posted by padresag

proportioning valve proportions(regulates) the flow between the front and rears brakes on a gm setup. if you didn't have one at all your back brakes would be locking up first
ron

Right - I have been adjusting the valve to diagnose this problem. From full shut, to wide open, and steps in-between. I can't get the front discs to effectively stop the truck regardless of how I have the valve set.