If you use the Autozone pitman arm puller.......the point needs ground off or it WILL collapase the ball joint threads.........
http://www.bettendorf.com/~mrbone/pictures/RR/balljointtool.JPG
To use it effectively, install it, tighten down till is just tightens up, then another 1/2 to 1 full turn. This will not "pop" the balljoint, but one swing of the hammer will.
DO NOT use the tool by itself to loosen the balljoint. YOU WILL RUIN the balljoint.
Fluffy said:
If there's an Autozone near your place, go borrow get the balljoint puller from them. You will have to put a deposit that's equivalent to a new purchase of the puller but you get a refund when you return it after use.
I tried it with a hammer but I got scared after hitting it pretty hard and it didn't budge. Balljoint puller worked great!