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A third-generation transmission electronic control system has been developed for the family of Allison off-highway transmissions. The new controls are identified by the acronym CEC2, which stands for Commercial Electronic Controls 2. The CEC2 controls will be phased into all off-highway transmissions and they will eventually replace the second-generation electronic control system known as Commercial Electronic Controls 1 (CEC1). The new transmission controls are primarily targeted toward mobile equipment applications, but they can also be used in stationary equipment applications.

The new Allison M6600 and M9600 transmissions incorporate continuous improvement items to achieve greater robustness in terms of reliability and durability. This was partially accomplished by incorporating components from higher - capacity transmissions into current products with minimal redesign and tooling. A key life factor for all transmission components is adequate lubrication and cooling, and improvements in this area were accomplished by decreasing restrictions and better utilization of oil that was previously exhausted to sump. The new transmission models have further enhancements to clutch life through improved control of clutch torque and slip times. These clutch improvements were developed through the use of improved computerized evaluation techniques utilizing lap-top computer programs. Also, a transmission -mounted floating-caliper, disc type park brake with integrated controls is being evaluated as a possible replacement for the current drum-type brake.