I have a vibration that is usually in the steering wheel and can also see the center console shake a little. It changes from week to week. I happens generally between 37 and 43 mph and again at 62 - 70 mph. had tires rebalanced multiple times and finally new tires today. new tires took care of probably 75% of the issue, but still has some vibration. In the last 6 months I have replaced the front shocks, sway arm links and sway arm bushings. shocks are Rancho and sway arm parts are Moog. Truck is basically stock. rebuilt FICM, EGR delete and turbo rebuild. Truck has been in to the alignment shop and no issues there. U-joints look good, no slack. Any help would be appreciated.