How about upper strut mounts? My little, old Ford Probe was pulling to the left usually and then to the right sometimes depending on which direction you just turned! I had alignments done a couple of times, replaced the rack (it was growling), and still pulling. Found out the the upper strut mounts were broken (rubber material cracked) and I had a bad strut on one side too. I replaced the upper mounts and the struts, had it realigned, and all is good now.