If my memory serves, the huge motors in GG1 locomotives are/were AC motors.
I thought it was ok to run ac train motors on dc
But...but....but, I ran my Lionel GG-1 with a car battery once?
They began printing "remove plastic" on frozen pizza just for people that listen to me ok
.
But power of some kind would likely end up behind it in box cars if it where to ever come to be. I thought there were already once a couple of shop cars of some type to get them short distances in a certain yard, or shop.
I'm not an expert, here's what I think I might know, hearsay....
Years ago while on another site, I was posting about modifying a few guide holes on GG-1s to get around 0-27 better. This doesn't change the coupler though. So on Passenger trains I needed an articulated coupler receiver, that could swing wide & still not bind. A matching, tuscan caboose was added till an express boxcar I like, was found.
Anyhow, one guy replies about my pants being down
, and "few know about those cars" "But you wont get far with your pants down, or be able to pull a train" came out of him.
I thought it was a joke, but he insisted little switchers had trouble with heavy, dead GG-s moving sometimes, and they boost-jumped them on occasion. (Maybe it was power for braking to stop?)
They had to "jump" to get a shoe up on occasion for sure, but that's a separated system (he also showed photo variations of paint, steam heat setup, water & fuel fillers (for heat), cabins, antenna, controls, repairs, shop work (in shop they "jumped" them from above, using long hand poles to place wire on the shoe). Unfortunately he has passed away, links too, and I do not have copies anymore. Reach for the salt.
