Here's the problem guys, hopefully someone has the answer. I manually adjusted my rear drum brakes and that emergency e brake bracket under the transmission. When I pull the E Brake handle the brakes will engage, for about 15 secs then gradually losen up. It feels like the cables are stretching and therefore allowing the brakes to disengage. Could the cables be so old that they stretch? And do i need new cables? or could it be something else? Thanks in advance.