Could be, but could also be a combination of that and/or ball joints, inner/outer tie rods. Grab your wheel at 9:00 and 3:00 and see if there is movement. Also do the same at 12:00 and 6:00. You may have worn suspension parts you're not aware of, especially if this happens most often while you're turning. Parts can be found here:
http://www.fcpgroton.com/CSV70/csv70suspension.htm
http://www.fcpgroton.com/CSV70/csv70suspension.htm