What's up everyone? So a while back I put a 4 inch suspension Lift on my Jeep. Also put on a SYE, new Adams rear drive shaft, adjusted rear pinion angle, and re-geared to 4.10 since I have the 3 speed auto. Since then I haven't had chance to drive it much. Took it out on the highway yesterday and I'm getting a vibe that shakes the steering wheel at 60 mph, so I'm thinking that I need to adjust the front pinion. Angle. Other than that the jeep drives great. My question is, do I just need adjustable front upper control arms to do that, or do I need uppers and lowers?