Allison Transmission Inc. has announced the new and improved features for its 2010 transmissions. Allison’s load-based shift scheduling (LBSS) feature will include a Super Economy Shift Schedule. This enhancement allows Allison LBSS to up-shift under cruising conditions to further improve fuel economy, the company reported. The transmission will continue to automatically select between economy and performance shift schedules based on the vehicle’s actual payload and the grade on which it is operating. LBSS is available on all Highway Series, Pupil Transport/Shuttle Series, Rugged Duty Series and Bus Series models. Super Economy Shift Schedule is available with SEM/LRTP capable engines.
Allison added that its 1000/2000 Series models feature increased horsepower and torque ratings to allow a broader range of applications at a lower initial cost. Allison 1000/2000 Series transmissions with shift energy management (SEM) are now rated up to 340 HP and 660 lb.-ft. of torque. Without SEM, they are rated up to 300 HP and 575 lb.-ft. of torque. Ratings may vary by model and application, the manufacturer noted.
Hardware enhancements to all MY2010 1000/2000 Series models have reduced the power required to charge the oil lube distribution and main pressure system. The introduction of the “variable modulated main” feature reduces main pressure when the clutch apply system does not require full main pressure. New Wave friction plates reduce internal drag. The result is more efficient operation that helps improve fuel economy, Allison said.