Brake issue.... Requesting input from you - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SACRAMENTO 71 · 10-19-2013, 01:00 PM

Good morning Everyone, hope the weekend is going well so far

Have a situation for you, and would REALLY appreciate as much input or advise as possible.

Truck Info: 1971 Blazer, Disc/Drum set up. All Stock axels

Recent Project: Checked rear brakes and noticed they need refreshing. So I installed new rear hardware (springs, clips, etc) new wheel cyls on both sides, had the drums mechined, and put new pads. Everything went great and I noticed a huge difference.

One week after the completion of the rear brakes project, i noticed that the truck felt sluggish on my way home ONLY, not in the mornings! The following day it got so bad that in traffic I did not need to use the brakes!! The truck would stop by it self!!!

Checked from brakes and the front left caliber was stuck/locked. So I bought new calibers, pads, turned rotors and completely flushed the system. Worked great for a few days and then on my way home from work i noticed that only my front brakes were working..............

So to sum it up, did the rear brakes, then the fronts started sticking. Fixed the fronts and lost all rear brakes????

Any ideas were to start????? PPV's? Master? Booster?

THANK YOU SO MUCH FOR YOUR HELP!!!! I always appreciate the time I get from all your responses! Nick

**jaros44sr** · 10-20-2013, 08:35 AM

I would replace the three rubber hoses, and master. Seems like a strange problem to arise after the work you did, but what do you have to lose...rockauto, shame you have 6" lift, cause i have new front hoses for ya

You might want to check your rear brake shoe adjusters, maybe they tightened up

Also, check and make sure the valve in the pv didnt shift as you were bleeding brakes. Is your brake light on....

JMHO, but it seems the problem is pointing towards the PV

**Tom Vogel** · 10-20-2013, 09:20 AM

You might want to post this in the regular truck section for mor views. I have to tell you, I got nothin'. Very odd.

Special-Ed · 10-20-2013, 11:36 AM

sounds like a flaky 40 yr old proprtioning valve and or a flaky master...

it this point i would replace everything that is original.... because its ready for failure anyways

10-19-2013, 01:00 PM	#1
SACRAMENTO 71 Registered User Join Date: Aug 2012 Location: Sacramento, CA Posts: 242	Brake issue.... Requesting input from you Good morning Everyone, hope the weekend is going well so far Have a situation for you, and would REALLY appreciate as much input or advise as possible. Truck Info: 1971 Blazer, Disc/Drum set up. All Stock axels Recent Project: Checked rear brakes and noticed they need refreshing. So I installed new rear hardware (springs, clips, etc) new wheel cyls on both sides, had the drums mechined, and put new pads. Everything went great and I noticed a huge difference. One week after the completion of the rear brakes project, i noticed that the truck felt sluggish on my way home ONLY, not in the mornings! The following day it got so bad that in traffic I did not need to use the brakes!! The truck would stop by it self!!! Checked from brakes and the front left caliber was stuck/locked. So I bought new calibers, pads, turned rotors and completely flushed the system. Worked great for a few days and then on my way home from work i noticed that only my front brakes were working.............. So to sum it up, did the rear brakes, then the fronts started sticking. Fixed the fronts and lost all rear brakes???? Any ideas were to start????? PPV's? Master? Booster? THANK YOU SO MUCH FOR YOUR HELP!!!! I always appreciate the time I get from all your responses! Nick __________________ 68 C10 SWB W/ 72 FRONT CLIP 343SB TH400 64 C10 SWB 406SB TH400 74 SUBURBAN 454BB TH400 78 K10 SWB 350 TH350 6" ON 35" BFG MUD 71 K5 350 W/ TBI 700R4 6" ON 38" BFG MUD 00 K3500 DRW BIG BLOCK "DRINKING PRBLM"

10-20-2013, 08:35 AM	#2
jaros44sr Senior Member Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,762	Re: Brake issue.... Requesting input from you I would replace the three rubber hoses, and master. Seems like a strange problem to arise after the work you did, but what do you have to lose...rockauto, shame you have 6" lift, cause i have new front hoses for ya You might want to check your rear brake shoe adjusters, maybe they tightened up Also, check and make sure the valve in the pv didnt shift as you were bleeding brakes. Is your brake light on.... JMHO, but it seems the problem is pointing towards the PV __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim Last edited by jaros44sr; 10-20-2013 at 10:18 AM.

10-20-2013, 09:20 AM	#3
Tom Vogel 2WD Jimmy Join Date: Mar 2005 Location: Davis County, Utah Posts: 2,565	Re: Brake issue.... Requesting input from you You might want to post this in the regular truck section for mor views. I have to tell you, I got nothin'. Very odd.

10-20-2013, 11:36 AM	#4
Special-Ed Registered User Join Date: Jul 2013 Location: Floriduh Posts: 386	Re: Brake issue.... Requesting input from you sounds like a flaky 40 yr old proprtioning valve and or a flaky master... it this point i would replace everything that is original.... because its ready for failure anyways __________________ Ed will be known as the Tiger Woods of the integration business

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