Front brakes squeal when the ceramic brake pads are engaged against the rotors. Gurgling and grinding noises behind the steering wheel and behind the brake pedal indicative of brake line issues. Brake lines not bled correctly, air in brake lines, or issues with the brake booster or pressure switch systems. Front brake issues occur the most in reverse during initial startup, when driving at a low speed, and during rainy or damp weather. Rear brakes give a loud squeal in reverse during initial startup.