I recently noticed some vibrationwhich seems to be coming from the fron drive line/ axle but it seems to go away at 70+mph. My h2 is lifted with 38" tires. i dont think it is a drive line angle problem.

I have also noticed a squeak from the front of my h2 near the front drivers side that is noticeable at low speeds...any help is appreciated!

 

I would check ball joints, tie rods and all linkage to start with. Also pull your skid plates and see if the problem goes away.