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				Alignment Needed After Rear Ball Joint Replacement?
			 
 
			I have a 2000 Boxster S in to a new (to me) mechanic for a thunking/squeaking sound in right rear.  He's diagnosed it as a bad ball joint which he has ordered.  I gather this comes with the control arm.
 Today he mentioned I needed to get it aligned after he installs the new part.  Tires have always worn evenly, car has always ridden smooth.  Do I really need an alignment after a rear ball joint replacement?  Or is it something I should road test and see how it feels?
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