Did you get yours fixed? Did the noise stop?
See I did the opposite of you and I have had to drive 2 hours roundtrip three times and still not fixed.
So what else could be directly affected that connects to the coils? Since the new coils helped it has to be something closely related to that area.
Nothing rubbing.. cleaned and greased the D bushings on the sway bar.. Found out through some other forums that it's just a design flaw in the oem shocks. A lot of other titans have the exact same problem. One guy he even said that he took a ride in a new 2011 with his dealer to see if it was just his truck or if it was something that was across the board, and he said that the new '11 had the clunk when it hit bumps with the manager driving. So, it looks like an upgrade is our only hope