Mrs Douglas' post got me confused, there are/were narrow gauge SD45 on those DD40X-looking trucks.
Here is the original post with a picture:
viewtopic.php?f=6&t=5902&start=15#p60973Might be very well these new GE's are their replacement?
Anyways, why didn't GE fit those Brazilian engines with standard gauge transport trucks? Perhaps the contract or insurance policy forbade running those engines on their own wheels?
Now they were an oversize load and probably a temporary PITA for the railroads involved intheir transport.
For those with knowlegde of Brazil railways or capable of Portuguese, what is the engine in the avatar of "Julio Rail" on the web page linked from my first posting?

Looks like an ex NP/VGN electric? Or possible NH EP-4 or even a MILW "Little Joe"?