I've invested in a tie rod puller and a pitman arm puller. I can't remember how much I paid for each, but I doubt that it was over $15 for each. I also can't remember which one I used to pull the lower ball joint, but I used the tie rod puller on the upper joint and both pulled effortlessly. They've been a good investment for me. Good luck!

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'82 240D Euro 68K and growing