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Why did UP choose the 70 macs
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the actual problems they initially had with the 90's wasn't with the H engine, rather they had some software bugs that kept them out of service for a bit. they are now assigned primarily to manifest service at 60mph or less, due to some ride quality issues, (i guess bouncing side to side at 70mph on a junk GE is o.k. though). to my knowledge none of the SD9043-MACS have been repowered with anything, although they were designed to be upgraded to the H engine and 6000 horses, i don't think the UP is going to do this anytime soon. currently emd is really cranking out those 70M's, both from mexico, and canada. i believe we are already in the 600's as far as delivery so they are really spitting them out. as for GE's on coal trains, give me 2-3 of those SD9043-MAC's any day! and on stacks, I'd rather have old 40's than new GE's.
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