Gearbox functions can be divided into three parts:
Mechanical
Hydraulic
Control System
Mechanical
|     •  | Torque converter with lock-up clutch  | 
 
|     •  | 2 planetary gear units, of which the rear is double.  | 
 
|     •  | Final drive with differential | 
 
- Torque converter housing 
 
- Torque converter clutch 
 
- Turbine 
 
- Impeller 
 
- Stator 
 
- Free wheel 
 
- Input shaft 
 
Hydraulic
- Torque converter 
 
- 	Valve housing:
 
- Clutch, brake 
 
- Oil cooler 
 
- Oil pump 
 
- Planetary gear
 
- Oil pressure 
 
- Gearbox oil, inlet 
 
- Gearbox oil, return 
 
- Operating pressure 
 
- Lubrication 
 
- Oil flow to pump
 
Control System 
|     •  | Transmission Control Module including gear position sensor  |