I have been through hell and back getting this 3.5-4" lift on today. Did the whole thing in the pouring rain on a muddy driveway. So, as long as I can figure out this rear axle vibration, then count on me being there, about 4" higher than before =) oh, and ill trade a case of beer for someone with GOOD knowledge of pinion angles/vibrations/t case drops..(anything having to do with a driveline vibration due to a lift) to look at my heep and diagnose the problem... and keep in mind, i drink GOOD BEER. I need this done ASAP! Id also like to find someone with a garage and a spring compressor so I can pop these 3/4" spacers up above my front coils so im level with the rear. (Rear sits at 4", front at 3.5") let me know. 719-205-5455.