I figured you guys would have some good ideas.I have a 89 suburban that I lowered 5"/7".Breaking does not act the same anymore.Before it was even breaking front and back.Now ,I have more breaking in the front than inthe back.The front tires will lock up and while the back is still spinning.Is a proportioning valve the solution?Inlighten me Can someone give a simple explaination of why lowering the center of gravity affected the breaks.