first why did you just ask the guys what they think? You didn't ask the gals but I'm going to give you my 2 cents.
My experience has been that it IS the upper control arms. You changed the geometry dynamics with the lift kit which put additional leverage on the bushings. Simple physics. At about 140,000 miles they usually start to wear. Whats the mileage on yours? That could be a problem for you if you have that high of miles.
To bad i'm not closer or I'd gladly come help!
Miss Jeep
My experience has been that it IS the upper control arms. You changed the geometry dynamics with the lift kit which put additional leverage on the bushings. Simple physics. At about 140,000 miles they usually start to wear. Whats the mileage on yours? That could be a problem for you if you have that high of miles.
To bad i'm not closer or I'd gladly come help!
Miss Jeep