If you don't have access to a tool truck go to a cheepo auto parts store and get a auto stethascope. Take the metal wond off the end so its just the bell or tube and have someone turn the wheel left and rite for you. Then take the scope and aim it twards the susp. parts tierod ends/ball joints/lower A arms to frame bushings.

When you find the noisiest area you will have your culprit.

Warning::: be sure to tell your assistant not to turn the wheel more than is needed so the don't break your arm.....lol