HELP!! Rear drum brakes sticking

['71StreetZ]

Hey all, my rear drums on my 71 are sticking when I use medium to heavy pedal pressure and don’t release until you pop the bleeders open I’ve replaced the wheel cylinders and checked the lines the master is only 6 months old and all the springs are very strong I don’t know what is cause one the problem could it be the booster? (the pedal is very heavy and always has been) let me know if you think of anything!

 

[ol' grouch]

Hey all, my rear drums on my 71 are sticking when I use medium to heavy pedal pressure and don’t release until you pop the bleeders open I’ve replaced the wheel cylinders and checked the lines the master is only 6 months old and all the springs are very strong I don’t know what is cause one the problem could it be the booster? (the pedal is very heavy and always has been) let me know if you think of anything!

I can think of several things that could cause this. Your rear wheel cylinders could be sticking but when you say you have to open the bleeders, that looks like the rear flex hose has collapsed inside. The front ones get changed a lot but the one in the middle in back going to the junction block on the differential gets ignored. It will let pressure through, but it won't let it release. Look under there and if it's got any cracks from dry rot, replace it. Eventually it will burst and you'll lose your rear braking. Bad mojo there as you may spin. Probably less than $25 for a quality new one.

 

['71StreetZ]

I can think of several things that could cause this. Your rear wheel cylinders could be sticking but when you say you have to open the bleeders, that looks like the rear flex hose has collapsed inside. The front ones get changed a lot but the one in the middle in back going to the junction block on the differential gets ignored. It will let pressure through, but it won't let it release. Look under there and if it's got any cracks from dry rot, replace it. Eventually it will burst and you'll lose your rear braking. Bad mojo there as you may spin. Probably less than $25 for a quality new one.

I just replaced the rear hose which seemed fine from the outside no dry rot or large links and it seems to be working I’ll take the car out tonight and see how it goes

 

[ol' grouch]

I just replaced the rear hose which seemed fine from the outside no dry rot or large links and it seems to be working I’ll take the car out tonight and see how it goes

They can look good outside but collapse inside. Any time you replace a wheel cylinder, it's a good idea to replace all three flex hoses.

 

[mallard]

Is the park brake cable properly releasing? They can seize up over time rather easily causing brake shoes not to release properly.

 

[Maze]

Is the park brake cable properly releasing? They can seize up over time rather easily causing brake shoes not to release properly.

just had this same issue on mine. sprayed a bunch of lube down the sheathing of the cable and good to go now!