Hello Guys I have been having some troubles with my Bachmann GP9. It does not have the pulling power that i want it to. I can't pull no more than 8 cars up a 1-1/2% percent grade. I have had the train for about 2 years and can't figure it out. In order for it to pull cars up the 1-1/2% percent grade i have to lash it up with another engine. Can anyone help me out?