Processor - Electronic Control Assembly (ECA)

On trucks equipped with gasoline engines, the operation of the E40D automatic transmission is controlled by the EEC-IV Electronic Control Assembly (ECA) processor. Many input sensors provide information to the processor. The processor then controls the actuators which affects transmission operation.

On trucks equipped with diesel engines, the operation of the E40D transmission is controlled by the transmission Electronic Control Assembly (ECA) processor. This processor controls the E40D transmission in the same way as the processor for gasoline engines. However, some of the input sensors are different.