bringing back this old thread. I never changed the ball joints because I read in another post that they can be left in long after the squeaking begins. I also did I visual inspection and they seemed pretty good. However, now the steering wheel frequently (but not always) shakes when driving at about 50+ mph, especially when accelerating. I was wondering if this was another possible symptom of bad ball joints, in which case I would definitely change them.

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headrivenoise... listen.