go through the steering under the jeep. check the steering gear bolts, the bolt holding the pitman arm on, and the tie rods. you should also check the track bar bolt on the axle side to make sure thats tight. my jeep was making a poping noise when i turned, and it turned out to be two of the steering gear bolts were slightly loose. they only tightned like a 1/4 turn tighter, but the noise went away. hope this helps.
98 xj with rc 6.5 in lift, re hack an tap sye, homemade steering box plates, durango steering box, v8 zj tie rod, soft 8s, 37in mtrs. 4.88 gears, no slip in the rear, electrical problems ect..