rear brake rattle on 2004 Ford Freestar

My 2004 ford freestar has a rattle coming from the rear that goes away when braking. Any advise???

Asked by for the 2004 Ford Freestar
Apparently the Freestar rear disc brakes do not have an automatic caliper adjustment mechanism. Meaning as the pads wear play develops between the piston and the pads. You need to use the parking brake on occasion, which adjusts the calipers. It sounds silly to me, but it worked on my Freestar. I was at about 50% on my pads and they started really rattle by merely going over road cracks and manhole covers. After reading a blog on this problem I tried the parking brake as suggested. I had to do it about six times before the rattle was just a minor ting here and there. Poor design in my opinion, but using the parking brake a couple times a month works for me, saving hundreds or more at the shop....
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Jack up the car and make sure the vehicle is properly supported, remove the wheels and inspect the brakes and brake mounting hardware for damage. Autozone have some popular workshop manuals for free on line once you register (for free) on their website
I have a 2005 freestar and had simular rear brake noise so followed what the visitor from Aug 07 2011 wrote, used the parking brake several times then it stopped the noise GREAT no cost and No noise and the brake pads are still like new, just replace 6,000 km ago