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Double Heading Diesels???
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<p>[quote user="UP_North"]My guess would be the fact that with the SD70ace there is no need to worry about short time ratings and with the SD45 there is. At those speeds, I'm sure the SD45 was running in the red and they had to notch down to let the SD45's traction motors cool down. By disconecting the MU cable they could run the 70ace in the 8th notch while running the Sd45 at a lower throttle setting to avoid exceeding the short time rating of the SD45 and toasting the traction motors.[/quote]</p><p>Oh, I didn't think of that. You're probobly right. I had thought is was because the SD70's wheelslip control wasn't letting it run at full power, while the SD45 could, because it didn't have the advanced wheelslip control. </p>
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