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1968 Brake Question

Willy 1

Active member
Joined
Jun 23, 2019
Messages
36
Location
Saskatchewan Canada
Hi I have been having some issues with the brakes on my car and curious if anyone has had the happen before. Here is the problem. I just finished restoring this car ( 1968 gt/cs) and had all of the brake system apart. Discs on the front drums on the rear. Brakes are set up properly but after driving a few miles the brakes get hot and if I where to try and drive farther it would get to the point that they lock up tight. I changed the brake booster and the master cylinder so I am leaning toward the rod being out of adjustment but would like to rule out any other possible issues. When the brakes are locked up if I loosen the line from the master cylinder to the rear brakes a little oil comes out and the brakes release. Any ideas I know it could be collapsed brake hoses also but would like to figure this out before I start buying a bunch of unneeded parts.
Thanks
 

speedy02

Well-known member
Joined
Mar 19, 2003
Messages
614
Did you have the Proportioning valve rebuilt?
 

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Ruppstang

Well-known member
Joined
May 22, 2009
Messages
3,032
Did you replace the rear brake hose? Most likely the proportion valve.
 
OP
OP
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Willy 1

Active member
Joined
Jun 23, 2019
Messages
36
Location
Saskatchewan Canada
As of yet I have not done anything. I hate to just start changing stuff doing a trial and error. May have to do it that way though. Think I can rule out anything mechanical as far as the brake shoes or anything like that as when the fluid pressure is released the brakes come off. I never did anything with the portioning valve. Thanks for the reply's
 
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