The ISX15 SmartAdvantage Powertrain using direct drive transmissions are designed to maximize fuel economy in specific duty cycles and operating conditions – some regional haul or LTL truckers will see better results using the small-step overdrive transmission.
Specs
| Power | 400 hp (298 kW) - 450 hp (336 kW) |
| Peak Torque | 1450 lb-ft/1650 lb-ft (1968 N•m/2240 N•m) @ 1000 -- 1550 lb-ft/1750 lb-ft (2103 N•m/2375 N•m) @ 1000 |
