Creaking noise when pressing brake pedal hard?

[xdarkxfirex]

I notice that many times when I am stopped on in park, and keep pumping the pedal hard, I notice a creak coming from the brake pedal. When I move the assembly with my hand side to side, I notice it too. I sprayed all the bushings and springs with silicone spray, and I still hear it. I even sprayed under the dust cover that connects to the booster.

The front breaks and sliders are fine, and so are the rear brakes.

[zerosl]

Mine always squeaks when you press it past halfway

[xdarkxfirex]

I lubed the rear drum contact points with permatex antiseize lubricant. Havent heard it yet. The creaking sound sounded like the spring under the pedal, but it wasnt