I just picked up this Lionel 6-18563 GP-9 NYC engine fairly cheaply. I am waiting on some more items to come in for my Legacy setup..so I ran it conventionally. I like the horn sound and it runs very smoothly. When I hooked my consist of cars 11 PW freight cars...the wheels spun and wouldn't really budge it. I disconnected and ran 4-5 freight cars fine. Is this normal for this older TMCC engine? Anything I can do to increase pulling power. I love long trains and was a little disappointed in the pulling power. It has magnatraction, but I am using Atlas NS track, so that doesn't help the equation. I have zero grade, since I have a carpet layout right now. Worse case scenario, I use it for short trains or a quasi switcher. Any help would be appreciated. Thanks
Andy