Hello new guy here, I wanted to ask fellow liberty owners for some input. The wife has a 2007 liberty sport 4x4 with 89000 miles on it. We have had this jeep since new. About 3 weeks ago we had all 4 tires replaced and about a week later the wife said it was pulling to the left so I took it in to get an alignment. The alignment shop said it only took a little toe out correction on right front to bring every thing in. On way home I noticed that while at highway speeds you could get the jeep to track left or right like there was no self centering present. When I got home and started inspecting I felt like the lower ball joints could be suspect so I made the decision to change them out and the uppers as well. I also checked tire pressures and rotated the tires front to back. I took the jeep back to the alignment shop and talked with owner he had a more experienced tech put it on the rack with me assisting/overseeing he listened to my concerns and I verified all overall numbers where with in spec. I suspected the castor was out and it was a little on the right. Every item I replaced was torqued to spec, no impacts were used. Upper A arms were torqued with vehicle in the level weighted. So this all to say the jeep is still super sensitive at highway speeds like a complete lane change with a 1/2 to 1" steering wheel deflection. The steering still doesn't want to self center although better than it was. The only item I can think now is the steering rack, like the valving is shot. Have you guys/gals have any ideas?