Thanks for the thorough answer.
If the alignment is in spec., especially the front toe, and there are no suspension/steering parts with wear/play, the only explanation I can come up with for the outer tread wearing faster is if you're consistently taking tight curves moderately fast - such as highway exit or entrance ramps that you routinely take every day. Many years ago, the treads on my tires always wore more towards the outer side. I finally tried consistently slowing down on exit/entrance ramps, and haven't had that issue since. Not saying that's your problem - just mentioning it in case it applies.
I just don't know what would cause that wear other than that or an alignment or worn part problem.
Feel free to post the complete alignment printout.
You might talk the shop into doing a free alignment check and printout if you tell them you previously paid for an alignment and you are having uneven wear problems. Again, definitely a check should cost much less than an alignment.
Re-think if you might have a bad or improperly installed suspension or steering part and convince yourself that everything's OK.
No sticking calipers (might explain the noise but wouldn't cause the uneven tire wear)?
You could try having a helper lie next to each side and see if they could locate the source of the noise as you pull forward and back up - if the noise is there at low speeds. Could also try jacking up front end and listening with engine running and tranny engaged to spin the wheels - but of course that would only work if the noise is not dependent on loading the suspension.
Precautions for spinning wheels jacked up:
• Of course use jack stands.
• If you only have one wheel off the ground while doing that, make sure you turn traction control off if you have it.
• Don't play around with spinning the wheels very fast with it jacked up because if one wheel isn't spinning (like if you have only one side jacked up, or a brake is dragging), due to differential action, the spinning wheel will be turning at twice indicated speed. So - if you spin at 65 mph as shown on the speedometer, it's spinning at 130mph. 90 mph indicated => 180 mph!! It's not pretty when a tire explodes due to being spun over it's rated speed - lots of vehicle damage and possible serious injury or worse. Advice: Don't rev it to more than 40 mph indicated (80mph actual) unless absolutely necessary.
'98 LXi - Later Concorde gages (black w/ chrome rings)/'99 LX - LHS gages (white) - HIR bulbs
Last edited by peva; 05-15-2016 at 11:33 AM.