What the hell is up with this!!!!!!!! I have 3 life like GP18's and one out pulls any other style of engine i have. including kato, C44-9's, SD70m's, atlas SD60m's, or even for that fact GP7's. Bachmann, Atlas, Kato, you name it out pulls anything on my roster. sort of my rivarossi 4-6-6-4 challenger. anything other then does not come close. 24 con-cor auto racks and 28 walthers well cars, nothing compares. Does anyone have a clue as to why this is? the gp18 has absolutley no traction tires or any after market pulling product. it is right from the factory. does anyone have a clue? cause i sure dont.