Why did UP choose the 70 macs

[Anonymous]

Actually they are not SD70MAC's. They are SD70M's which is almost totally different. The 70M's are DC transmission where as the 70MAC's are AC. BIG difference. As I understand, UP wanted a value leader and EMD had it, the SD70M.

[Anonymous]

The 70s don't have all the computer stuff like the 90s. That is what UP wanted. I think more 90 would be better than any GEs for coal service.I also think a EMD sales person was realy good when they talked to to UP. Maybe EMD can build them faster too.

[Anonymous]

I thought they would opt for more 90 macs instead 0f 1000 70's. The whole idea behind the 90 macs was 2 for replacement of the older sd40/40-2's. Were the 90macs to troublesome, and the 70's were more reliable.