toys2nv:wav: , your engine IS an SD40-2:winki: , and it IS an Athearn:thumb: . you can tell its an SD40-2 by the 2 large porches at the front and rear of the engine, and the site glass in the hood door close to the back of the unit on the right side:winki: .
i can tell its an Athearn by the railings, motor setup, and light setup:winki: , it looks like an Athearn "Blue Box", not an RTR or Genesis:winki: .
hope i helped:smilie: .
:deano: -Deano