Intersesting theory about the wheel contacts. I suspected similar as running trains would remove some of the contact issues (such as removing dirt/minor corrossion) as did cleaning - both yielded some performance improvements on both of these locos. I also have an Atlas SD40 and it runs fine. I also have another C424 and it runs fine. It is so odd some units affected and run awful in command mode?? I am going to try giving the wheels a good cleaning and see if that helps. Thanks for your insights guys!
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