I own a 06 Tacoma Prerunner DC with 3000 miles. Last week i had the parking brake freeze on me. It was cool that morning and whem i went to go to work, i found out that my truck would not move. when i tried to accelerate the driverside rear spun in the dirt and the passenger side rear was frozen solid. I cant say that I was mad because it was funny. So, I waited till later when the temp. warmed up outside to try again. I went to move it this time and when i tried to acclerate there was a loud bang, horray, it broke free! Everything seemed fine until i noticed that when Im stopping now there is a slight vibration coming from the middle or the rear of the truck. I dont feel it in the steering wheel or in the brake pedal, but you notice it in the seat. The truck is smooth as silk at any speed, but when you slow down, it seems to bounce a little. There are no other problems, like weird sounds or behaviors. Does anyone have any idea of what this can be? Is this normal after its broken in? Can a drum brake warp? Could I have bent something while trying to move it? Or am I just losing my mind? Thank you for any help or insults.