I have a very noticeable vibration at around 2800 rpms . I also feel some vibration idling . Any thoughts or ideas what to look for . I'm still under the 100, 000 mile warranty and the truck is a 2007.5 , 6.7L. About a mouth ago The wire going to the Electric fan popped from the bottom loom ??? and was slinging around the inside and trashed the radiator and fan blades . It was vibrating some before that happened . Could there be some relationship to the vibration and that problem too .

 

It could be the Dual Mass Flywheel that is bad. They are pretty weak.