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The lower ball joints need to be pressed out of the control arm, so you will need a ball joint press and you can likely rent one from a parts store.
NOTE: Extreme pressure lubrication must be used on the threaded portions of the tool. This will increase the longevity of the tool and insure proper operation during the removal and installation process .
CAUTION: When installing Remover 8677 to separate the ball joint, be careful not to damage the ball joint seal.
Instead of the special tools to separate the ball joint from the knuckle you can use a hammer and give the control arm a few good whacks.