I need to fix this thing fast, I am leaving on vacation for a month and the guy taking my lawns needs to use my truck while I am gone! All started last night when I started it up and it was vibrating real bad after startup (the engine was probably pitching 2" or so!) Then it started sounding like a really bad exhaust leak or something is rubbing everytime it goes around. (but not metal..???) Even when cranking it make the noise really loud like a fan blades catching a lot of air. I do notice that it still starts up the same so i really dont think its something wrong with the engine like was my first thought (broken valve spring or a cylinder not firing or something) My next step is to remove the cover between the engine and tranny and see if something wrong with the fly wheel or something. I have checked everything over visibly from the outside so I am NOT just asking before I pop the hood... Anyone have any idea, its my first diesel and my first Auto tranny. Last night it seamed to drive ok too maybe a little low on power though.