Gooseneck Coupler

[4570Man]

To me, that looks like a pipe seam split from freezing. Most pipes are welded seam and not drawn. Until it's pulled from the trailer, you won't now for sure. Just glad it didn't turn ugly when towing a load!

Look at the top part of the hitch it’s square. The bottom piece where it’s split is almost round. It undoubtedly filled up with water and froze which split the tube and also stretched it almost round.