An automatic transmission with housing, input shaft, output shaft, four planetary gear sets, and six shift elements. Second element of second planetary gear set forms first shaft; second element of third planetary gear set forms second shaft; first elements of first and second planetary gear sets form third shaft; third element of third planetary gear set forms fourth shaft; second element of first planetary gear set and third element of second planetary gear set form fifth shaft; third element of first planetary gear set forms sixth shaft; first elements of third and fourth planetary gear sets form seventh shaft; and third element of fourth planetary gear set forms eighth shaft. First shift element is between third shaft and housing; second shift element is between fourth shaft and housing; third shift element is between second and eighth shafts; fourth shift element is between fourth and fifth shafts; fifth shift element is between fifth and seventh shafts; sixth shift element is between sixth and seventh shafts.