Chuck Youngblood

Sorry, I didn't know what else to call it.

Replace mc

UPDATE: I just got my brake issue taken care of, it was not the booster this time, it was the front brake chamber that was not letting fluid flow back in so once I drove it for more than a few minutes the brakes were dragging. This was a real pain getting it figured out and I was blaming the booster because it was doing almost the same thing it was doing with the bad booster. Thanks to all who replied, I appreciate it.

There is nothing in that suggestion that is valid in this case, sorry not being an ass but if ny of that was the problem it would be worse cold (?) and the problem would not go away when I remove the vacuum line. I am 70 and I have never had a bad booster and I have had many cars. I did buy it used but no problems for at least 5-6 months. It does do it every time I drive it unless it is a very short trip so yes, the fluid would be warm at least.

I had forgot to tell you that it is the front wheels that are the tightest but with the percentage of braking done by the front I would venture to say it is affecting all 4 corners. I agree about the cheap parts I just had to R&R 3 alternators on another car of mine to get one that worked. I have about had it with this booster b.s. but I could never sell it like it is so I guess as long as NAPA keeps replacing them I'll have to keep changing them, that's the part that pisses me off. I sent an email to the company that puts them out so I'll (hopefully) see what they have to say. I see you have a Yamaha RD 350, I had one of those back when I was riding that little sob is FAST!

Just that, the brakes will start gradually dragging. They will actually hold the truck in gear, if I give it just enough throttle to let it roll then let off it stops immediately, no gradual slow down.

I was starting to think you were on to something with the hoses deteriorating but the darn thing will get to where they are dragging very noticeably and I stop, pull the vacuum line off the booster and the truck rolls free as can be. However, it just starts all over again in a very short time.

The master was new when I got the truck last year. I just picked it up because it was 4WD and it was priced right. The master has never went down one bit I'm going to get hold of the maker and talk to them. The booster has a lifetime warranty but I am 70 years old and do my own work and I am not going to change it again. Might be an easy job for a young guy but I'm far from that.

I sure hope you find something.

I had never heard of it either but when the first NAPA unit failed they called the factory and the tech verified that it really does happen but it happens occasionally when the engine oil is getting sucked in through the vacuum hose. This is not the case, the hose was dry inside. I suppose it could be two bad ones in a row but I really don't think that at all. When the booster(s) were new the truck rolled as free as can be so that rulles out brake pedal adjustment.

I have an '07 Sierra w/ 5.3 4WD. 183,000 + I had what I believe was the original brake booster go bad by applying the brakes itself. I replaced the booster but about 3 months later it happened again. NAPA stood behind the booster so I put another one on it. Now it's about 2-3 months later and it is starting to do the same thing. We checked the 2nd booster for any oil residue inside from the engine and found none. What is causing this?