When i am backing up in reverse and put on the brakes, i hear a loud thump. then after i put it on drive and go foward and put on the brakes it does it again. i can feel this on the brake pedal also. That is the only time i hear the noise is when i back up and put on the brakes then go foward and put on the brakes.

Lots of possibilities here, any work done on the brakes or front end recently?, try tightening the caliper brackets first, 60 torx.

I had the same noise comming from my back end. I pulled the wheels off and found it was my brake pad moving in the caliper due to a rusty pad. It was floating and would clunk the same as you described it. Make sure the calipers slide.
Mike