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A new hybrid transmission has been developed for all-wheel-drive (AWD) cars, and is used in the new Lexus LS600h and LS600hL for its first application. It has a compact layout consisting of a power-split device, generator, high-output electric motor, and a two-stage speed reduction device. Combined with a 5-liter V-8 engine, it achieves power performance rivaling 6-liter engine vehicles, the fuel efficiency of a medium-class vehicle, and outstanding quietness. This paper describes the structure, performance, and shift control technology of this hybrid transmission.