Planetary transmission, especially dual-clutch planetary transmission

A dual clutch planetary transmission (1) having a first planetary gear set (P1), a second planetary gear set (P2) and a third planetary gear set (P3) with at least a first frictional shifting element (K1) and a second frictional shifting element (K2) for shifting to various power paths in a power flow and first, second, third, fourth, fifth and sixth shape-fit shifting elements (A to F) for attaining various ratio stages within the power paths, the first and the second frictional shifting elements (K1, K2) and the first, the second, the third, the fourth, the fifth, and the sixth shape-fit shifting elements (A to F) are placed between shafts (S1 to S3, ST1 to ST3, HR1 to HR3) of the first, the second and the third planetary gear sets (P1 to P3), also having a housing (2), a transmission input shaft (3) and a transmission output shaft (4) and a gear stage exchanger to change at least first, second, third and fourth gear stages by the first and second frictional shifting elements (K1, K2) without any interruption of continuous traction, and at least one of the first and the second frictional shifting elements (K1, K2) serve as a clutch, and the first, the second, the third, the fourth, the fifth, and the sixth shape-fit shifting elements (A to F), the first and the second frictional shifting elements (K1, K2) and the first and the third planetary gear sets (P1 and P3) are positioned within the housing and communicate with one another such that activation of the first, the second, the third, the fourth, the fifth, and the sixth shape-fit shifting elements (A to F) can be effected without access through rotating parts.