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I just replaced my upper and lower ball joints and inner and outer tie rods in my driveway my recommendation is get a lifetime front end alignment from Firestone $120 or so and take it as often as you want. I have you tube video of replacing them, (at least they are up loaded) not sure if posted. Only problem was getting drive shafts out of hubs. Otherwise just time to take apart the tire brakes and get out the lower ball joints. Getting them in was not bad as I stuck them in the freezer overnight.
Thanks for the advice the tire shop quoted replace both sides just didn't know if it was upper or lower and inner or outer. I'm guessing it would be best to just replace it all while I have it apart.