Transtage
| A Transtage | |
| Manufacturer | Martin Marietta | 
|---|---|
| Country of origin | United States | 
| Used on | Titan III | 
| General characteristics | |
| Height | 4.57 meters (15.0 ft) | 
| Diameter | 3.05 meters (10.0 ft) | 
| Gross mass | 12,247 kilograms (27,000 lb) | 
| Engine details | |
| Powered by | 2 AJ10-138 | 
| Maximum thrust | 8,000 lbf (36 kN) each | 
| Specific impulse | 311 seconds (3.05 km/s) | 
| Burn time | 440 seconds | 
| Propellant | Aerozine 50 / N2O4 | 
Transtage, given the United States Air Force designation SSB-10A, was an American upper stage used on Titan III rockets, developed by Martin Marietta and Aerojet.