Powertrain for vehicle

A powertrain apparatus for a vehicle, the powertrain apparatus comprising:

• an input shaft receiving power;
• first and second drive gears provided on the input shaft;
• an output shaft mounted parallel to the input shaft, and configured such that a differential is connected thereto;
• a first driven gear and a second driven gear rotatably provided in the output shaft to be engaged with the first and second drive gears, respectively, to form respective gear stages;
• a first clutch configured to selectively connect the first driven gear to the output shaft;
• a second clutch configured to selectively connect the second driven gear to the output shaft;
• first and second driveshafts engaged to the differential and provided to output power in opposed directions from the differential;
• and
• a third clutch configured to change a connection relationship among a selected driveshaft of the first and second driveshafts, the second driven gear, and the output shaft by sliding along an axial direction of the input shaft while being connected to the output shaft via the second clutch,
• wherein the third clutch includes:
• a main sleeve splined to a hub connected to the output shaft via the second clutch;
• and
• a sub-sleeve provided to be rotatable with respect to the main sleeve while sliding in the axial direction is constrained.