As the market needs of environmentally conscious cars are rising, a hybrid transaxle (P710) was developed to achieve both high fuel efficiency and excellent power performance. P710 was developed based on the new development strategy TNGA (Toyota New Global Architecture). By adopting motor miniaturization, the new gear train and the parallel gear system of motor reduction mechanism, low loss, small size and light weight have been realized. Moreover, by adopting an insulation structure for the current on the motor shaft which is generated as a contrary to the miniaturization of the motor, high reliability and excellent durability were realized. Furthermore, by adopting a new structure damper, both high fuel efficiency and high quietness were realized. This time, we present about these technologies.