Tie Rod Ends (TRE)
I have replaced mine twice, but the first one's I think were shorted on grease. Doh.
Spring sag: I made this theory years ago and nobody on mud agreed with me that it would be substantial enough. I disagree. Jack up the rear frame so the rear axle droops all the way down. Measure the horizontal distance from the axle to the door. Now fully compress one side of the rear suspension (ramp) and measure again. You'll find the axle "moved" backwards a good bit. To me, it's not too far of a stretch to say that cruiser lean has an effect on alignment. My lean is now severe, last year was bad, and 3 years ago was almost non existent.
1978 13BT-40, 70 series mechanicals
1966 FJ45 lwb stock
2003 100 stock
1974V8J40, 1992FJ80, 1985FJ60, 1971FJ55, 1978FJ40, 1974FJ40, 1997 LX450 all long gone.