Patent ID: 8801563

Claim:
A planetary gear-automatic transmission, comprising: a planetary gear-automatic transmission having nine forward speed gears, the planetary gear-automatic transmission, comprising: precisely one transmission input element; precisely one transmission output element; precisely four planetary gear sets; and precisely six shifting elements, each shifting element being provided for shifting individual speed gears of the nine forward speed gears of the planetary gear-automatic transmission, wherein when a first clutch is in a closed state, a first planetary wheel carrier and a second planetary wheel carrier are coupled in rotation with each other, and a first planetary gear set comprises a first hollow wheel, which is securely connected to a housing of the planetary gear-automatic transmission; a first sun wheel, which is arranged in a rotatable manner; and first planetary wheels, which mesh with the first hollow wheel and the first sun wheel; the first planetary wheels being mounted in a rotatable manner on the first planetary wheel carrier.