Ford Explorer front end rattle

Hi all,
Just wanted to know if anyone has had any problems with the front end of a Ford Explorer 97 xlt rattling. I cant seem to find the problem but it happens mainly when i go over light bumps ,it sounds as if the shock absorber is moving just slightly but i have had them checked and there ok. Could anyone with any suggestions or know of any problems please reply as this problem is worsening and no-one seems to know what it is.

Thanks in advance.