i did something similar to you a couple weeks back. i ran over a median i did not see in providence, and had to drive all the way home to MA wondering what the hell i broke. turns out that i pushed the front strut arm assembly forward enough to dislodge it from the subframe. lots of clunking and banging for a couple of weeks. i must have hit enough bumps in the road since then, though, cause there is no more noise. must have just worked itself back in!!! if you want, i can take pics of what i damaged at work tomorrow so that you know where to look. just a place to start i guess.
2003 Ford Expedition: 5.4L, harley supercharger, 2.93 upper pulley, 4lb lower pulley, c&l plenum, jlp cai, LFP SBTB, FTSP, Magnaflow 3" catback, Eclipse AVN-5510, white face gauges, cobalt c2 boost gauge, ddm hid's, 379 rwhp, 465 rwtq sold 11/3/12
2009 Ford Flex Limited AWD