today when i was put my car into park then shortly after i felt something kinda jump in my front end well anyway after that when my car begins to slow down or or when it stops i hear this real loud humming noise in the front end i think it is one the drivers side but i know for sure that its on the front it so what do you think is wrong with my lexus

 

Did you bend your knees and take a look at what is trapped inside the brake?

 

Have your transmission checked with the Lexus in the air. Question is where this noise is originating and it's cause?