Hi ! I recently received my Union Pacific (soon to be Souther Pacific) standard Bachmann F-9 diesel. after and during the break-in and still, the engine needs a "60" on my m.r.c. power pack, this makes the engine run very hot, but it still runs smooth that way. in reverse, it runs at "45" and stays totally cool. I took it apart, cleaned off the extra grease, checked for binding gears, drivetrain slack and motor for any debris and all checked out. re-assmbly, same thing ! since F-9's or any F units rarely ran solo, especially on the espee, i run it in multiple with dummies, right now it's pushing a PA-1 which is pushing a FM-C-liner ( i know s.p. didn't have these but it looks good painted grey and red) and it's pulling seven daylight cars. I really don't want to send this engine back, but i was wondering if i overlooked something that might cause this ?