Train Transmission automatic transmission for vehicles.

transmission train of an automatic transmission for vehicles comprising a fluid torque converter (TC) receiving its power engine (E), a first brake (B1) for locking the second ring gear (26) of a first portion of shift (a), so that the output of a second sun gear (24) receiving its power from the turbine of the torque converter becomes the first forward speed, a second clutch (C2) for transmitting power of a stator (S) in the torque converter to a transfer drive gear (38), a first clutch (C1) for directly transmitting the engine output to a first ring gear (12) of the first change portion speed (a), a third brake (B3) which locks a third ring gear (48), such that the third ring gear operates reaction member, and a third clutch (C3) connecting the Premi shift st part (A) at a second speed changing portion (B).