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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!
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| | | | Joined: Apr 2005 Posts: 2,097 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,097 | Normally you don't need a proportioning valve on drum/drum brakes and depending on what master cylinder your supplier sent you it may or may not have an internal residual valve. I would go back and revisit how the lines are installed and recheck the installation of all components. Also bleed the system again.
This is usually a fairly straight foreward installation and you should not have these problems. You may still have to install an adjustable proportioning valve for the rears to make the system function correctly.
Fred
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine
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