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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Jan 2008 Posts: 502 Shop Shark | | Shop Shark Joined: Jan 2008 Posts: 502 | I can't see what your saying. There's one piston in the master operating two separate systems. The only thing I can't figure is the proportioning valve which is there to prevent the front disc from applying until the rears have had time to apply.
Now how the P valve works when the rear fails is the part I have no knowledge of.
Dan
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101st Screaming Eagles
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