I own a 2011 LS460 AWD. When lifting off the accelerator, especially while going down hill, there is a mild osculating vibration seemingly in the drive train. Even the slightest pressure on the accelerator and the sensation is gone. The condition is predictable and repeatable. I have had it to the dealer and their explanation is plausible but their resolution of “just live with it” is disappointing to say the least. I would like to know if anyone else has experience this phenomena before I share the dealer‘s explanation. Thank you for considering this question.