Had this issue on our 2012 Tour and 2014 Ellipse, both 42QD. The problem for us was lessened, not resolved, by frequently lubing the Lippert mechanism as shown in this video.
http://youtu.be/gXw9I_DoAvI
Chris & Deb - North Venice, FL - 2014 Itasca Ellipse 42QD - Toad: 2014 Jeep Rubicon