2004 Honda CRV. Changed front rotors and pads about 2 months ago. rotors are raybestos and pads are akebono. no shims on the new pads. also installed new aftermarket brake pad clips. lubed the slider pins and greased the clips. everything went back together fine. noticed that when i go over bumps or expansion joints i hear a rattle coming from the front brakes, like something is loose. the rattle goes away when the brakes are engaged. any ideas? could the pads be slightly out of spec? could it be the lack of shims on the new pads? or the aftermarket pad clips? my simple mind is stumped.