Including GP 40-2 and all other variations
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EMD Road Switcher GP 40
| GP 40 | GP 40-2 | GP 40TC | GP 40P | |
| Horsepower | 3,000 | 3,000 | 3,000 | 3,000 |
| Wheel Arrangements | B-B | B-B | B-B | B-B |
| Production Years | 1965 - 1968 | 1972 - 1974 | 1966 | 1968 |
| Engine Model | 645 | 645 | 645 | 645 |
| Cylinders | 16 | 16 | 16 | 16 |
| Number of Units | 1,264 | 1,090 | 8 | 13 |
The GP 40P and 40TC have a longer frame which is not reflected in the drawings.