I continue to try to troubleshoot a pull to the left under acceleration. At this point I have excluded tires (rotated L to R on several occasions with no change), alignment (caster is a tiny bit low at 1.7), wheel bearings (new), knuckle bearings (new), and brakes. So, now I'm looking at the tie rod ends. With a front tire jacked up, pulling back and forth on the 3 and 9 positions, I can feel no looseness. All 4 ends (tie rod and relay rod) seem okay in this regard. The outer relay rod end was replaced only a few months ago, after coming apart completely during an attempt to do an alignment. The tie rod seems to swivel back and forth on its axis rather easily (compared to the relay rod), and there is grease coming out of the boot on the driver's side TRE. So, my question is - what are the odds that a tie rod end could be causing the pull, despite not being able to sense any looseness when wiggling the tire?