All right guys... . I have a friend that has an 04' (305-555) with an edge EZ box. The truck is 1 ton dually 4 wheel drive. He wants me to ask you all about his wierd clutch sensations. He says loaded when he lets out on the clutch it feels like a vibration is coming over the whole truck. He says it almost knocks his foot off the clutch. He says it doesnt feel like its shutering more like a bucking or vibration. The way he explained it to me "it feels like a button clutch, like it either wants full engagement or disengegement but nothing in between" Any ideas???? Thanks for your help guys I appreciate your time.