Planetary gear train of automatic transmission for vehicles

A planetary gear train of claim of an automatic transmission for a vehicle, comprising:

• an input shaft for receiving an engine torque;
• an output shaft for outputting a shifted torque;
• a first planetary gear set including a first rotation element, a second rotation element, and a third rotation element;
• a second planetary gear set including a fourth rotation element, a fifth rotation element, and a sixth rotation element;
• a third planetary gear set including a seventh rotation element, an eighth rotation element, and a ninth rotation element;
• a fourth planetary gear set including a tenth rotation element, an eleventh rotation element, and a twelfth rotation element;
• a first shaft interconnecting the first, sixth, and eleventh rotation elements;
• a second shaft interconnecting the second, fourth and seventh rotation elements, and directly connected with the input shaft;
• a third shaft connected with the third rotation element;
• a fourth shaft connected with the fifth rotation element;
• a fifth shaft connected with the eighth rotation element, and selectively connectable with the fourth shaft;
• a sixth shaft connected with the ninth rotation element, and selectively connectable with the fourth shaft;
• a seventh shaft connected with the tenth rotation element, and selectively connectable with the sixth shaft;
• and
• an eighth shaft connected with the twelfth rotation element, directly connected with the output shaft, and selectively connectable with the fifth shaft.