2000 Chevy Camaro brakes shake

2000 Chevy Camaro mileage: 105,000. When I'm driving on the freeway and have to apply my brakes real hard it shakes very badly. There is a sound coming from my driver side tire that is also, where it shakes (like a rubbing sound) all the time. The brakes work great if I'm going slow or apply them real slow. And yes I have got my tires rotated, balanced, I have replaced the rotors, brakes, calipers, the hub for the bearings; I have also done the back brakes too! I know that it has to be the driver s side but where? Maybe it is out of alignment, bad master cylinder, shocks, rack and pinion?