Self-Study Program

Transmissions
21
Design – Six-Speed Automatic
Transmission 09D
In its basic design, the six-speed automatic
transmission 09D is similar to other
automatic transmissions.
Major components include:
• Lock-up torque converter
• Automatic transmission fluid pump
• Simpson design simple planetary
gear set
• Ravigneaux design dual planetary
gear set
• Three multi-disc couplings
• Two multiple-disc brakes
• Hydraulic control valve assembly
External axle drive
The Touareg application
uses an external axle drive
that is unique for Volkswagen.
From the automatic transmission output
driveshaft, the torque of the engine enters
a transfer case that is bolted onto the
transmission housing.
From the transfer case, the torque
is transmitted to the drives of the
front and rear axles according to
traction requirements.
SSP297/088
Hydraulic Control Valve Assembly
Automatic Transmission Fluid Pump
Output
Driveshaft
Dual Planetary Gear Set
Simple Planetary Gear Set
Component Locations
Input Driveshaft
Lock-Up Torque Converter