I took delivery of my custom-ordered 2011 LTD in December and started hearing the noise in March (I started this topic.) I cut-and-pasted AXM's posting below in which he/she believed that his/her dealership and finally discovered the heat shield solution and e-mailed it to my dealership and they said they would look into it but it's now been a week and have received nothing back. Maybe AXM could tell us the name of his/her dealership so we can direct ours to it?