A gear change-speed unit for an automatic transmission includes a reduction planetary-gear set, a single-pinion type planetary-gear set, and a double-sun-gear type planetary-gear set, which are disposed in parallel in this order from the side of an input shaft....http://www.google.fr/patents/US6935985?utm_source=gb-gplus-shareBrevet US6935985 - Gear change-speed unit for automatic transmission
