i have a slight vib going through my truck. i feel it more on my feet then in the steering wheel. i had new ball joints,track bar,tie rods etc put on the truck along with new tires. also my steering box is leaking. my question is can the steering box be bad and be causing the vibration. also my axle u joints are bad could this be causing the vibration? while going down the road at about 70 mph the vib pulses through the 4x4 lever. you can hear it but if you reach down and grab the lever you can feel it. any info would be greatly appreciated. thanks