These tabs are part of the formed bottom plate of the crossmember. They are on all four corners, and are held in place by the four large spot welds mentioned earlier.
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Next, you remove the amount of your ‘section’ …. In my case 2”….
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After removing the two inches, the top of tab was been removed, along with the upper two spot welds. I cleaned this area, and fully welded it on both sides.
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