Weld the upper ball joint in ?

RedFish said
I think most of the failures are due to rust. The male threads on the ball joint are exposed out the bottom. If those threads are seriously corroded and someone uses the impact from hell to back the ball joint out, the weaker female ( material reference not gender ) threads in the arm can be destroyed.
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Xs2. I have never had to weld one but we don't have a serious rust problem either. As with anything soaking down the threads with a good penetrating oil for several days always makes things come apart easier with less chance of damage.