esu sd40-2

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  1. W

    Intermountain HO SD40-2 help

    I have acquired some of the recent Intermountain HO SD40-2's with the ESU sound decoders. When I have them in consist running as a pair or trio they seem to surge which in turn creates an accordion effect in the train. It does it a lot at slower speeds and I don't notice it as much at higher...



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