Automatic transmission with hydraulic operator having nested drums

An automatic transmission comprising:

• a planetary gear unit having a plurality of rotary components and a reaction member;
• an input shaft connected to at least a first of said rotary components;
• an output shaft connected to a second of said rotary components;
• a brake for selectively braking said reaction member;
• a first clutch system comprising:
• a first drum;
• a first hub member fixed to said first drum slidably mounted on and rotating with said input shaft;
• a first clutch mounted within said first drum;
• a first piston slidably mounted in said first drum for selectively engaging said first clutch;
• and
• a second clutch system comprising:
• a second drum;
• a second hub member fixed to said second drum and rotatably mounted on said first hub member;
• a radially extending portion connecting said second drum with said second hub;
• an axial extension fixed to said radially extending portion, said first clutch selectively connecting said axial extension with said first drum;
• a second clutch for selectively connecting said second drum with one of said rotary components;
• and
• a second piston slidably mounted in said second drum for selectively engaging said second clutch.