My shift knob will not shift completely back into park. I was cleaning my plastic panels, and I took them out and the shift knob as well. When I put it all back together, the shift knob goes into park but will not lock, and can simply be bumped back into reverse (regardless if the ignition is on). I tried everything I could think of, any ideas? Also the car doesn't need the brake pedal depressed to start, it goes straight to the ON ignition position and hit it again starts.