My 98 did this (more of a low growling noise) and it turned out to be "the rack & pinion binding," saith the dealer. Anyway, they fixed it.
captTelescope
Hi Groups,
>
> My 60K Ford explorer'99 XLS sqeaks at the front ends when I turn
> steering wheel all the way to the side (both left and right.) The
> noise sounds like breaking something at the front end that scares me.
> Any input would be greatly appreciative.