A few updates...
First, looks like the passenger side motor mount may have excessive movement in it and that's causing the growling sound/feel at 3k RPM. Calling dealership tomorrow to have them fix it under warranty.
Second, I got my driveshaft back today and reinstalled. Evo skids won't go back on till dealership does warranty work.
Third, I took a pic with a rainbow
Be totally lame if that was in fact what it is but a bad motor mount would cause vibrations. But, be good to finally be able to get it fixed.
Nice shot of your jeep BTW.