What about gear ratios? - Trains Magazine

EMD's ratings for F7 starting TE were as follows:

65:12        85,000

62:15        64,600 

61:16        59,600

60:17        55,200

59:18        51,200

58:19        47,800

57:20        44,600

56:21        41,800.

However it qualified the five highest ratings by stating that those TE levels would only be attained if rail conditions were "favorable".