After reading all the intermediate levers threads, I don't think this is my issue.

I don't get rough shaking or SES light. My engine just seems to vibrate all the time. Worse when in gear, but not by much.

Plus I am sure I am not loosing power, as a matter of fact I am leaning toward the car being a beast. How do I know? Well I ripped the piss out of my friends 06 4.4i. Tore a Range Rover Sport a new one two days ago. Yesterday went for a drive at 1am. While in manual, 2nd gear, sweeping road, full throttle, the car screams and pulls with suck ferocity that the tires fight for traction. It is very crazy how the fronts pull you through and the nose of the car is lifted

But I found a thud yesterday. Locked in first, when I let up off the throttle, I get a thunk, throttle, thunk. Tried 2nd and 3rd after that. Doesn't make a diff which rpm or gear. Really leaning toward mounts.