hello this seems to be the most informed jeep form going. I have a horrible wobbling experience in the front end of a well kept 99 cherokee sport. it becomes nearly unberable over 55 mph. have checked all the typicl front end parts; tie rods, controll arms, stabliser u joints and all rubber bushings. was not able to find any slop anywere. had tires balanced just to be sure. truck is really undrivable over 50mph. could this be a hydrlc issue in the pwr steering box. any info would be appreaceted. dont want the start replacing expensive front end parts to chase this gremlin.

 

has it been aligned recently?

 

Did you check by pushing and prying by hand only or have someone turn the wheel back and forth while you watch for movement, all best when done with rig on the ground, not jacked. Doesn't have to be slop, just slight movement is enough.

Check the trackbar, this is #1 cause, for any movement, you may not see it at the trackbar, watch for the whole axel to move side to side. Yes slop in the steering box can be a cause.