Auto Manual of VW Passat B5

VW Passat
The maintenance instruction
1. Maintenance service
2. Engines
3. Cooling system
4. Fuel system
5. Engine management
6. An exhaust system
- 7. Transmission
    7.1.2. A coupling disk
    7.2. A mechanical transmission
   - 7.3. Automatic transmissions
      7.3.1.2. Adjustment of the mechanism of a gear change
      7.3.2. Completely an automatic transmission
      7.3.2.1. Adjustment of a cable of switching (an automatic transmission)
      7.3.2.2. All-wheel drive cars
8. A running gear
9. A steering
10. Brake system
11. A body
12. Heating, ventilation
13. An electric equipment

7.3.2.2. All-wheel drive cars

THE GENERAL DATA

Transmission of all-wheel drive cars

1 – the engine,
2 – coupling,
3 – a transmission,
4 – a power shaft,
5 – a shaft of selection of capacity,
6 – a target shaft,
7 – forward differential,
8 – differential,
9 – карданный a shaft,
10 – a leading gear wheel of back main transfer,
11 – back differential, I – first transfer,
II – second transfer,
III – third transfer,
IV – fourth transfer,
V – fifth transfer,
R – transfer of a backing,

А1 – A drive of a forward axis,
А2 – A drive of a back axis,
Т – тахопривод

All-wheel drive cars are designated by word SYNCRO. For a drive of back wheels on the car in addition distributing box, карданный a shaft, back main transfer and back power shafts establishes ся. For alignment of speed of rotation of forward and back wheels the special differential is used. In addition special differential redistributes a twisting moment between a forward and back axis of the car. At proslipping of wheels of one of axes of the car the twisting moment transferred to other axis, automatically increases. Coupling of wheels of the car with a road covering thus improves. On an axis where contact of wheels to a road covering reduces ся, the twisting moment transferred to this axis therefore stability of the car to lateral drifts increases also decreases. Irrespective of it the special differential supposes rotation of wheels with various speed that is necessary for normal work of antiblocking system of brakes. Distribution of twisting moments in special differential is made with use of cogwheels and worm differential.
The special differential works independently, without operating signals. Technical parametres of differential are defined by parametres of worm differential. Main principle which is put in differential that worm differentials on the one hand rotate easily and freely, and on the other hand hardly or do not rotate at all. Process of redistribution of twisting moments occurs very quickly and smoothly, thus its external displays are not appreciable.

The special differential fastens to картеру transmissions. Differential greasing is carried out by the same oil, as transmissions. Thus oil replacement is not required.

Back main transfer with differential is filled трансмиссионным with oil GL5 SAE 90. Quantity of oil of 1,5 l. Oil replacement while in service the car is not provided. Check of level of oil is carried out through a special aperture.

Repair of special differential and back main transfer is necessary for making only at specialised servicing deport.