Trucks: B-B Flexicoil
Engine: No engine, requires electrical connection from a powered locomotive
Gear ratio: 62:15
Maximum speed: 65 mph
Operating weight (lbs.): 254,000
Tractive effort (lbs.): 46,740
Length: 44′ – 5 3/4″
Rebuilt from MLW S-3 locomotives for hump service in 1965 – 1966, upgraded to work with GY-9, GY-12 and MY-10 and MH-10 locomotives in hump and flat service in 1978 – 1979l
Electrical controls, cables and traction motor blowers converted to work with GY-418 (GP9RM) locomotives in 1990
| Road no. | Class | Former road nos. | Renumber date | Renumbered to | Renumber date | Notes / disposition |
| 700 | Gy-00m | 354, 312, B-13 | 1986 | 269 | Feb 7 91 | Converted to Flexicoil trucks in 1986 |
| 701 | GY-00m | 355, 313, B-14 | 1986 | 270 | Apr 9 91 | Converted to Flexicoil trucks in 1990 |