Hello guys, I need your help with this problem. I just purchased a Kato GE AC4400CW on ebay and it's used. It runs great at slow and fast speeds. I also purchased a new Kato GE C44-9W on ebay as well. The problem is, I'm currently running a DC system but the locomotives run at different speeds. The C44-9W is significantly faster than the AC4400. I don't see anything wrong with the slower loco and it actually runs very smooth even at a very slow speed. The only thing I can think of is that the motor might be a different production. I don't think they're geared different and I don't see any articles about these machines being geared differently. I guess I could try replacing the motor? Thanks for your hellp.