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AISIN AW has developed a six-speed automatic transmission TF-60SN for front wheel drive (FWD) vehicles. This new TF-60SN has been developed based on the concepts of minimizing length and mass increase as compared with current five-speed automatic transmissions, and providing the world's first transverse FWD six-speed automatic transmission. This has been accomplished using a newly developed planetary gear set, and a new “squeezed” torque converter. In addition, the control system features a unique design that maintains outstanding compactness and achieves a high quality smooth shift feeling. This paper describes the construction, characteristics, and functions of this six-speed automatic transmission.

AISIN AW has developed a five-speed automatic transmission “55-50SN” for front wheel drive (FWD) vehicles. This new 55-50SN has been developed with a concept to minimize length and mass increase compared with the current four-speed automatic transmission, and is one of the most compact five-speed automatic transmissions in the world. This has been accomplished by newly developed planetary gear sets, a new differential, and a new squeezed torque converter. In addition, the control system is made by a unique design to maintain the excellent compactness and to achieve a high quality smooth shift feeling. This paper describes the construction, characteristic, and function of this five-speed automatic transmission.

Aisin AW has developed a new lightweight, compact automatic transmission: the 60-40LE. The 60-40LE is designed for small cars of up to 1.6L engine displacement. The transmission is an electronically controlled, 4-speed, front wheel drive transaxle utilizing a unique, compact planetary gear train. This new planetary gear train, combining a dual planetary gearset, establishes the shortest shaft length of its kind. The electronic control system allows for improved shift quality. Application of a linear solenoid allows for optimum control, especially during 2nd to 3rd gear shifting and shifting without the application of a one-way clutch.