What would cause an ear piercing metal on metal grinding sound?

What is your question?

Speed does not matter but every so often when making a right hand turn.... there is an ear piercing metal on metal grinding sound coming from the front driver side. Everything from the (hubs)(brake disc's)(rotors)(brakes)(calipers) everything is fine. Nothing is loose or rattling not even the the bearings.

What makes this problem better or worse?

No right turns

How long has your 1998 Toyota Sienna had this problem?

Couple of days