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Both the SD70ACe and SD70M-2 are 74' 3" long. Continuous tractive effort for the SD70ACe is said to be about 147,000 lbs. (some sources say 157,000), which is about 10,000 lbs. more than an SD70MAC. For the SD70M-2, CTE is about 113,000 lbs., which is about 4,000 more than an SD70M. <br /> <br />The SD70ACe has two horizontal grids/intakes that run across the AC inverters on the left behind the cab. The SD70M-2 lacks this feature. Its just a blank sheet of metal. Also the SD70ACe has an angular box directly above the AC inverters and has two extra handrail stanchions. Again, the SD70M-2 lacks these features. Also on the left side of the locomotive, the SD70ACe has two columns of three horizontal grilles/intakes located on the dynamic brake while the SD70M-2 does not. The right side of the locomotives are very similar and I cannot find any major detail differences.
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