NS 7524
| Uprated from 4,000 to 4,400 horsepower |
ES44DC
| 56451 | 1 | 208507 |
NS 7543
| Upgraded from 4000hp |
ES44DC
| 56470 | 1 | 211325 |
NS 7580
| Uprated from 4,000 to 4,400 horsepower. Equipped With Track Measurment |
ES44DC
| 56989 | 2 | 199240 |
NS 7645
| |
ES44DC
| 57871 | 1 | 210466 |
NS 7662
| |
ES44DC
| 57888 | 7 | 223949 |