What would cause my G500 to shudder when reaching about 55mph?

What is your question?

My G500 does fine until I get the same part of the highway on my way home for work. The whole car begins to shudder and I feel like the steering wheel will whip out of my hands from the vibration. I have to stop on the side of the highway and try and go again. My breaks have just been replaced, what causes this vibration? It never happens on any other section of the highway.