Trucks: B-B
Engine: 16-645 D-3-A, 2,500 hp
Gear ratio: 62:15
Maximum speed: 65 mph
Operating weight (lbs.): 257,000
Tractive effort (lbs): 49,000
Length: 56‘ – 2″
Order no.: C-301 (No. 4000), CR-302 (No. 4001)
| Road no. | Class | Build date | Builder’s no. | Renumbered to | Renumbering date | Notes / disposition |
| 4000 | GR-25a | Aug 64 | A2061 | 9300 | c. Oct 81 | |
| 4001 | GR-25a | Aug 64 | A2062 | 9301 | c. Oct 81 | Built using components from several wrecked locomotives |