Thread: Brake Help on 37 Chevy

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Thanks for all the information and help. I have tried everything possible. I still think there is air in the lines. Last night if I push the pedal down it goes down almost to the floor before it will stop the car. If you pump the pedal 3 times quick the pedal only goes half way down and it will stop or slow it down. I talked to my buddy who installed it and he said we can should be able to return the booster and the mastercylinder. I was hoping to purchase a whole new setup that mounts to the firewall. Is there any brand that is good for this and is there any downside to having the setup at the firewall vs hidden under the floor? Lastly what do most trucks for these years use? Thanks a lot.

With the cylinder under the floor, you need a higher pressure residual pressure valve. The system will allow air back in with a normal valve.

you said you installed "a" new residual valve. you need 2 of them if you are using a duel master cylinder. with a booster, when you start the motor the paddle is suppose to go down some. if it don't you have a booster problem. how many valves do you have installed?