The microprocessor based controller is a second generation Allison Transmission Electronic Control system (ATEC II). Implementation of this feature is achieved through use of an adaptive closed-loop clutch pressure control system. A key advancement in the state-of-art of transmission shift quality has been achieved with the WT transmission through use of a fully automatic self calibration feature. The WT design provides expanded capabilities over present transmission technology and results in improved performance with benefits in life cycle cost. Included is a complete family of heavy duty automatic transmissions which will become part of the Allison Transmission product line starting in 1991. The transmission system has been designated the World Transmission (WT). ![]() Allison Transmission Division of General Motors Corporation is currently developing an electronically controlled automatic transmission system utilizing advanced technologies in microprocessors, application specific integrated circuits (ASICs), sensors, actuators, displays, and direct electronic clutch pressure control.
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