Need brake help fast.
Thread Starter
Melting Slicks
Joined: May 2000
Posts: 2,305
Likes: 5
From: Orlando,Fl,USA
Need brake help fast.
The 77 got stuck on the road today after getting off the HWy. Brakes were smoking and the car was unable to roll anymore. The brakes locked out. Anyway I let it cool and it was able to drive a few blocks, just enough to make it to my garage. It felt like it was dragging and I totally lost my brake pedal on this ride back. Pedal went to floor after cool down. I used my E brake and 1st gear to get home. I jacked up car, removed rear wheels and all looked fine for the rear. (BTW brake fluid was still in resevoir as normal). Front drivers side wheel was almost impossible to spin . I opened the bleeder valve and it loosened up and spun freely. Car has new pads and rotors < than 6 months. I replaced master cylinder 2 yrs ago & new rubber brake hoses 5 years ago. New brake lines to rear 7 years ago.
I'm thinking proportioning valve?? I am going to have a hell of a time getting that thing off though. I sprayed it with PB Blaster and will try again in am. Could this be the proportioning valve causing the problem??
I'm thinking proportioning valve?? I am going to have a hell of a time getting that thing off though. I sprayed it with PB Blaster and will try again in am. Could this be the proportioning valve causing the problem??
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
The 77 got stuck on the road today after getting off the HWy. Brakes were smoking and the car was unable to roll anymore. The brakes locked out. Anyway I let it cool and it was able to drive a few blocks, just enough to make it to my garage. It felt like it was dragging and I totally lost my brake pedal on this ride back. Pedal went to floor after cool down. I used my E brake and 1st gear to get home. I jacked up car, removed rear wheels and all looked fine for the rear. (BTW brake fluid was still in resevoir as normal). Front drivers side wheel was almost impossible to spin . I opened the bleeder valve and it loosened up and spun freely. Car has new pads and rotors < than 6 months. I replaced master cylinder 2 yrs ago & new rubber brake hoses 5 years ago. New brake lines to rear 7 years ago.
I'm thinking proportioning valve?? I am going to have a hell of a time getting that thing off though. I sprayed it with PB Blaster and will try again in am. Could this be the proportioning valve causing the problem??
I'm thinking proportioning valve?? I am going to have a hell of a time getting that thing off though. I sprayed it with PB Blaster and will try again in am. Could this be the proportioning valve causing the problem??
This is fairly common. As mentioned above, you need to replace the flex hoses at each caliper. They get old, and swell between the layers. This traps fluid in the caliper putting pressure on the rotor effectively locking up your brakes. That's why the wheel turned when you released fluid.
Replace all four, inspect all the rotors and pads, and make sure you don't have any fluid leaks to tend to.
Le Mans Master
Joined: May 2006
Posts: 7,708
Likes: 266
From: indy indiana
sorry dogboy,but you will also need to replace the pads on that side.(most likely)If it got that hot, inspect the entire assy.carefully. good idea to replace the flexhose's too. Ran into the same issue on a 66 coupe I was working on,so dont feel like the lone ranger.
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Le Mans Master
Joined: May 2006
Posts: 5,814
Likes: 414
From: Pittsburgh suburbs Pa.
This is fairly common. As mentioned above, you need to replace the flex hoses at each caliper. They get old, and swell between the layers. This traps fluid in the caliper putting pressure on the rotor effectively locking up your brakes. That's why the wheel turned when you released fluid.
Replace all four, inspect all the rotors and pads, and make sure you don't have any fluid leaks to tend to.
Replace all four, inspect all the rotors and pads, and make sure you don't have any fluid leaks to tend to.
This is an undetectable problem by visual inspection but very common with the aftermarket junk hoses. 
Thread Starter
Melting Slicks
Joined: May 2000
Posts: 2,305
Likes: 5
From: Orlando,Fl,USA
UPDATE.....
Found the problem and fixed it . After pulling all wheels and checking hose, etc. nothing looked bad. I found a ton of sludge in the front master cylinder chamber. It seems that the rubber sealing gasket deformed itself and started to decompose gunking up the brake fluid to the point that it plugged it up and locked out the front brakes. New Master cylinder and complete flush using synthetic Brake fluid and all seems fine. Rotors feel good no wobble.
Found the problem and fixed it . After pulling all wheels and checking hose, etc. nothing looked bad. I found a ton of sludge in the front master cylinder chamber. It seems that the rubber sealing gasket deformed itself and started to decompose gunking up the brake fluid to the point that it plugged it up and locked out the front brakes. New Master cylinder and complete flush using synthetic Brake fluid and all seems fine. Rotors feel good no wobble.
Le Mans Master
Joined: Oct 2007
Posts: 7,442
Likes: 968
From: Tennessee/Rhode Island
I would still ditch all the rubber brake hoses and replace them with the flexible stainless steel ones and never worry about them again. I have had mine on the car for 17 years! Don't try that with rubber brake hoses!
Burning Brakes
Joined: May 2006
Posts: 893
Likes: 7
From: Hazerswoude-Rijndijk Zuid Holland
Solved the same issue, bought myself new Goodridge SS lines.
I know they are only hoses but look at them what quality, excellent. Braided with silicon cover. Guaranteed forever.
I know they are only hoses but look at them what quality, excellent. Braided with silicon cover. Guaranteed forever.