So here's my problem....... From a dead stop, in 1st gear or 2nd which ever i start moving in....As soon as i start to take off and let the clutch out the truck starts violently shaking. I have the truck in my shop and torn down, tranny out clutch out diff cover off ect. the internals of the transmission are solid and still look brand new, as well does the internals of the rear end. one of my u-joints is worn but would not cause such a violent problem. I'm stumped on what the cause of this problem could be. any suggestions would be greatly appreciated. If you have encountered this issue before and know the fix that would be awesome!!! thanks for taking the time to read this.