I have an '06 LJ Rubicon. I recently had it regeared from stock to 5:38 Revolution gears. 42RLE auto trans on 3.5" suspension lift, 1" body lift and new 35x12.5/15 Cooper SST Pro tires. I have a severe vibration starting at about 50 mph and beyond thru 70 mph. There is also a vibration while in Park or neutral sitting still while increasing the RPM range up and through 2500 rpm's. Any help would be HUGELY appreciated!