SSW 7274-7293
These units were purchased by SSW rebuilt from various GP40's. They were upgraded to GP40-2 standards and given the model designation GP40M-2. They lacked the typical gyralight option that SP/SSW had previously specified on their locomotives.
SSW 7274-7293:
| SSW number | Orig. number | const. number |
| SSW 7274 | RI 371 | 7942-10 |
| SSW 7275 | WP 3535 | 7332-9 |
| SSW 7276 | MKT 233 | 7127-3 |
| SSW 7277 | WP 3518 | 7272-2 |
| SSW 7278 | WP 3544 | 7332-18 |
| SSW 7279 | WP 3533 | 7332-7 |
| SSW 7280 | WP 3538 | 7332-12? |
| SSW 7281 | MKT 221 | 7192-11 |
| SSW 7282 | MKT 176 | 5713-3 |
| SSW 7283 | B&O 3759 | 7275-20 |
| SSW 7284 | B&O 3686 | 7943-3 |
| SSW 7285 | SAL 604 | 7885-5 |
| SSW 7286 | SAL 620 | 7897-5 |
| SSW 7287 | B&O 3687 | 7943-4 |
| SSW 7288 | SCL 1588 | 7183-23 |
| SSW 7289 | SAL 619 | 7897-4 |
| SSW 7290 | WofA 727 | 7250-2 |
| SSW 7291 | L&N 3024 | 7075-15 |
| SSW 7292 | B&O 3777 | 7301-13 |
| SSW 7293 | B&O 3754 | 7275-15 |