2008 f150 lariat with RCX 6" lift kit and 35s. recently have been having some issues with alignment. since ive lifted the truck ive had a bunch of alignments probably bout 6 or 7 and the last time I had it aligned I had to take it back the next day because it got off within 3 hours of driving. I am also on my 3rd power steering pump within about a year or so.

could this be cause by a bad rack and pinion?

or maybe another issue?

any input appreciated, thanks