My drivers rear pads were down to bare metal after 25k miles since they were done last. the fronts look fine- i haven't done any crazy e-braking or anything.
i thought it was sticky, but the piston is turning smoothly back into the caliper, and the slider pins are also moving smoothly.
i'm just going to put on new pads/rotors for now, but does anyone have any clue as to what could cause this?

btw i'm running SS lines and OEM pads/rotors if that makes a difference...
TIA

edit: just took off the pass. rear wheel, and pads were below spec there too. i'm gonna check the parking brake cables now.

check the parking brack cables. also common that the barcking park braket and spring thingy will rust and bind. If that is the case then rust penatrant and some white lithium grease will fix this. if cables replace them.

jack up the drivers rear and spin tire if binding a little grab bracket arm in release position if binding stopes you have found the cuase

i checked the cables and spring for the e-brake, and all are working fine. when i spin the wheel, i hear a slight rubbing, but not enough to slow the wheel down.
Now I'm really worried that it's either the MC or the proportioning valve, but the only way to check that is to dissasemble them, and that seems like a major PITA.
what am i overlooking?

not sure what you are over looking . the wheel spining freely? are the pads lubed and not stuck to hardware. did you try again after yanking e-brake than then spin wheel again. are you spining it freely with wheel bolted on to check? Have you compared results with the oposite side?
One important fact it that the brake pads need to slide freely in tork member where the rest on hardware. I donth think the porblem exists in the master cyl. get the whole back end up and carfully compare the free sping of both wheels after brakeing with pedale and ebrake

I think I am having the same problem. Sometimes, after I use my parking brake, I can hear the rear passenger side brake rubbing. It seems to get worse when making right had turns as well. It usually goes away after a little while, but recently it has been rubbing longer. Where is the spring and bracket located on the rear brake?

hey I had a similar problem by caliper was bad and the wheel would spin fine. After I drove a bit and used the brakes, the caliper wouldn't release all the way, it was also leaking fluid. The way I found out was when I was done driving I would touch the rim and it would be extremely hot compared to the other side. Give it a try, replacement calipers are around 80 bucks at advanced auto parts after core return, worth the money in my opinion.

My rim isnt any warmer that the rest, but I did notice that the disc was warmer than the others. These cars can be quite annoring. Always a series of little problems with them.

sorry then Im not too sure what the problem could be. Try seeing if the pads move easily in their slots make sure they aren't getting caught on the hardware... Aside from you might want to check those spring things that hold both caliper parts together, not sure what they are called. These are the ones that have the black little spring rubber covers on them, just make sure they are lubricated and don't get stuck.

the braket has a a pring and is bolted to calber and e-brake cable atatches to it. it is what tranfers the brake piston with out the hydrolic depresion of the pedel