The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - What master cylinder/proportioning valve to use?

**Rickysnickers** · 02-11-2019, 06:16 PM

I don't know as you will actually need a residual pressure valve for the drum brakes. My understanding is the only time you need one is when the m/c is below the level of the drum brakes, such as when the m/c is mounted on the frame. Before buying one, you may want to look into whether you really need it or not.

02-11-2019, 06:16 PM	#10
Rickysnickers Senior Member Join Date: Oct 2014 Location: Eagle, ID Posts: 2,937	Re: What master cylinder/proportioning valve to use? I don't know as you will actually need a residual pressure valve for the drum brakes. My understanding is the only time you need one is when the m/c is below the level of the drum brakes, such as when the m/c is mounted on the frame. Before buying one, you may want to look into whether you really need it or not.