Thank you for the fast reply.
Most recent development:
So yesterday at the end of the day, I checked the car for leaks at the master cylinder (both at firewall and brake pedal). Nice and dry. I couldn't take the rims off as I was at work. I fluid in the master cylinder reservoir was also at the full line.
I started the car and the brakes seemed absolutely fine. Nice and crisp and strong like before. So I drove (very cautiously) home avoiding the freeway. Everything went fine most of the way home, but the at the last two miles or so the brakes started to be not as responsive again. Same as before, the brakes worked but I had to press the pedal much further down in order to stop.
Once I got home I pulled the rims. The front brakes looked fine. Nice and dry.
I pulled the rear rims and the drums off and the same, nice and dry. Brake cylinders don't seem to be leaking. However the rim in the rear was hot, very hot. And the drum was also hot.
This morning, drove all the way to work and not a single problem. Both front and rear rims were cool to the touch after driving on the freeway for 50 miles.
Thursday, September 12th, 2013 AT 5:34 AM