Automatic transmission

An automatic transmission comprising:

• a transmission housing (GG);
• a rotating transmission input shaft (AN);
• a rotating transmission output shaft (AB);
• first, second, third and fourth planetary gearsets (RS1, RS2, RS3, RS4), each of the first, the second, the third and the fourth planetary gearsets having first, second and third elements (SO1, SO2, SO3, SO4;
• ST1, ST2, ST3, ST4;
• HO1, HO2, HO3, HO4);
• first, second, third, fourth and fifth shifting elements (A, B, C, D, E) which are selectively engagable for implementing various gear ratios between the transmission input shaft (AN) and the transmission output shaft (AB);
• the second element (ST2) of the second planetary gearset (RS2) forms the transmission input shaft (AN);
• the second element (ST4) of the fourth planetary gearset (RS4) forms the transmission output shaft (AB);
• the first element (SO1) of the first planetary gearset (RS1) being, via the first shifting element (A), immovably fixable to the transmission housing (GG);
• the second element (ST1) of the first planetary gearset (RS1) and the third element (HO4) of the fourth planetary gearset (RS4) are permanently connected to one another;
• the third element (HO1) of the first planetary gearset (RS1) being, via the second shifting element (B), immovably fixable to the transmission housing (GG);
• the first element (SO4) of the fourth planetary gearset (RS4) being connectable, via the third shifting element (C), to the second element (ST2) of the second planetary gearset (RS2);
• the third element (HO2) of the second planetary gearset (RS2) and the first element (SO3) of the third planetary gearset (RS3) are permanently connected to one another and are connectable, via the fifth shifting element (E), to the first element (SO4) of the fourth planetary gearset (RS4);
• one of the first, the second and the third elements of the fourth planetary gearset (RS4) being permanently connected to one of the first, the second and the third elements of the third planetary gearset (RS3), and another one of the first, the second and the third elements of the fourth planetary gearset (RS4) being connectable, via the fourth shifting element (D), to another one of the first, the second and the third elements of the third planetary gearset (RS3), such that the third planetary gearset (RS3) is brought into a power flow of the automatic transmission (GE) by engaging the fourth shifting element (D);
• the automatic transmission (GE) having a fifth planetary gearset (RS5) with first, second and third elements (SO5, ST5, HO5);
• the first element (SO5) of the fifth planetary gearset (RS5) being permanently connected to the third element (HO2) of the second planetary gearset (RS2);
• the second element (ST5) of the fifth planetary gearset (RS5) being permanently connected to the first element (SO2) of the second planetary gearset (RS2) and being immovably fixable, via a sixth shifting element (F), to the transmission housing (GG);
• and
• the third element (HO5) of the fifth planetary gearset (RS5) is permanently connected to the first element (SO1) of the first planetary gearset (RS1).

An automatic transmission comprising:

• a transmission housing, a transmission input shaft, and a transmission output shaft;
• first, second, third, fourth and fifth planetary gearsets, each of the first planetary gearset, the second planetary gearset, the third planetary gearset, the fourth planetary gearset, and the fifth planetary gearset having a sun gear, a planet carrier and a ring gear;
• first, second, third, fourth, fifth and sixth shifting elements, and selective engagement of the first, the second, the third, the fourth, the fifth and the sixth shifting elements implements various gear ratios between the transmission input shaft and the transmission output shaft;
• the planet carrier of the second planetary gearset being permanently connected to the transmission input shaft;
• the planet carrier of the fourth planetary gearset being permanently connected to the transmission output shaft;
• the sun gear of the first planetary gearset being immovably connectable to the transmission housing by engagement of the first shifting element;
• the planet carrier of the first planetary gearset being permanently connected to the ring gear of the fourth planetary gearset;
• the ring gear of the first planetary gearset being immovably connectable to the transmission housing by engagement of the second shifting element;
• the sun gear of the fourth planetary gearset being connectable to the planet carrier of the second planetary gearset by engagement of the third shifting element;
• the ring gear of the second planetary gearset being permanently connected to the sun gear of the third planetary gearset and connectable to the sun gear of the fourth planetary gearset by engagement of the fifth shifting element;
• the sun gear of the fifth planetary gearset being permanently connected to the ring gear of the second planetary gearset;
• the planet carrier of the fifth planetary gearset being permanently connected to the sun gear of the second planetary gearset and being immovably connectable to the transmission housing by the sixth shifting element;
• the ring gear of the fifth planetary gearset being permanently connected to the sun gear of the first planetary gearset;
• and
• either:
• the sun gear of the fourth planetary gearset being permanently connected to the ring gear of the third planetary gearset, and the planet carrier of the fourth planetary gearset being connectable to the planet carrier of the third planetary gearset by engagement of the fourth shift element, or
• the planet carrier of the fourth planetary gearset being permanently connected to the planet carrier of the third planetary gearset, and the sun gear of the fourth planetary gearset being connectable to the ring gear of the third planetary gearset by engagement of the fourth shift element.