I’m pretty sure GM transmissions cross the border 4x at various stages of assembly before returning to be sold. How the heck is that the most efficient manner?! Who knows, but if it’s what they’re doing, it’s either the cheapest, or there are kickbacks involved…
UPDATE: I was wrong…it was scrap → transmissions, and it’s 7X?!!
However, capitalists are creative and adaptable. No matter what the political conditions are, the shrewd will find ways to make money…