Good that the dealer will do it for free. I got pretty lucky with my "move-up". I got my old TT with a 2000 Mitsubishi Montero Sport. Like you, I realized I needed somthing bigger in a hurry. I also went to a F-250. Mine just happened to be a perfect transfer over. I didn't have to adjust a thing, except move up one link on the torsion bars of the weight distribution. I was pretty amazed.
Ed and Sharon
2010 Wildcat 28RKBS
2011 Ford F-250 XLT, 6.7L PSD
Ride-Rite Airbags and Airlift wireless remote compressor...nice!
I thought I was wrong once, but I was wrong!