There have been numerous posts over the years about what happens when one of your rear ball joints comes apart so I won't bore you with the horror stories. I noticed a pretty loud creaking noise from the left rear and isolated it to one of the ends of the UCA. I figured since I had not gained any weight recently that I probably should replace both of them. With the recent purchase of a pitman arm puller (Well worth the $12.00 with shipping) it took me at most 45 minutes to replace both rear UCA's.
Now, I have this habit of tearing apart the components I remove before tossing them in the trash. Even though the UCA's felt fine on the car and did not appear to have any play both joints were toast. The one on the left that was making all the noise was REALLY toast. It is scary to think what might have happened if it stayed quiet until it failed. My car has 290,000 miles on it.
So, I want to recommend to everyone here to replace the UCA's if you haven't already done so. The cost of parts was about $80. If you are fortunate enough to have a really low mileage 3G you probably can ignore this, but peace of mind is very valuable.
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