Did some cherokees come with adjustable ball joints from the factory? Reason I ask is I need to replace the upper and lower ball joint on one side and one of the local parts stores only sells adjustable uppers. The other store in town sells non adjustable uppers. I just wanna be sure I get the right parts before I tear it appart. If it matters, my rig is a '00 4.0l AW4 NP231 8.25 3' lift 30x9.50-15's 4.56 gears.