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Audi Q7 Power transmission by the inventor of the quattro . The powertrain concept of the Audi Q7 offers impressive performance at high speeds in addition to outstand ing dynamics, both on and off the road. The permanent quattro four wheel drive with asymmetric, dynamic torque split ensures maximum traction and cornering stability. These features are essential to good driving dynamics and active motoring safety, par ticularly when driving on paved roads and at high speeds. The newly developed transfer case 0AQ is the centrepiece of the power transmission system. This SSP deals mainly with the design and function of this new development. 363 001 Contents Introduction Drive concept . 4 Subassemblies overview . 6 Brief description of the gearbox 6 speed manual gearbox 08D . 8 6 speed automatic gearbox 0AT / 09D . 9 Gear selector mechanism Automatic gearbox selector mechanism 11 Manual gearbox selector mechanism refer to SSP 299 . Transfer case 0AQ Design / function of transfer case 0AQ 16 Self locking centre differential 18 Components overview / design / function 19 Asymmetric basic torque distribution . 21 Asymmetric/dynamic torque distribution 22 Chain drive . .26 Lubrication . .28 Oil supply / sealing . 30 Service Service / special tools . 31 Useful information Operating instructions 32 This self study programme teaches the design and function of new vehicle models, new automotive compo nents or new technologies. Reference Note The self study programme is not a workshop manual All values given are intended as a guideline only, and refer to the software version valid at the time of publication of the SSP. Please refer to the relevant service literature for current inspection, adjustment and repair instructions. Introduction Drive concept Rear axle differential 0AB 363 002 As an SUV with excellent on and off road The sub assemblies step up gear, front axle differ driving d