Transmission is the same, as it will physically bolt on but there may be some minor differences. Some of the electronics/harness may differ, especially from the Titan. Only way to know for sure is through the Vin and part numbers. My guess is the same year Armada and Titan with same differential gearing (Tow package vs. No Tow package) will work. Again, part number is the only way to know.
2005 SE Off Road: JBA LT Silver ceramic coated headers, Cajun B-Pipes with Heavy Metal Cats, Borla Dual SS Cat Back, Uprev Tuned, K&N Air Charger, CSF 3328 Aluminum Radiator, Grille Craft Upper and Lower Grill, Burtman Rear Air Reflector, Manik SS Nerf Bars, Nissan Tow Mirrors, Bilstein HD's, Moog 81085 Rear Coils, AirLift 1000 Rear Springs.