Allison Transmission’s new Load-Based Shift Scheduling (LBSS) for MY09 Allison 1000/2000/3000/4000 Series automatically selects between Economy and Performance shift schedules based on the vehicle's actual payload and the grade on which it is operating to optimize fuel economy while maintaining high productivity capability, even during heavily loaded situations.
Using advanced algorithms to calculate real-time vehicle load and operating grade, LBSS selects the appropriate shift schedule for the task at hand. It is calibrated to primarily use the Economy mode, but automatically selects the Performance mode when conditions require. LBSS is part of the standard Shift Energy Management (SEM) calibration for approved engines.
