Volkswagen Multivan 2010 Service Training page 26

Power transmission
Cutaway view – rear axle box
The rear final drive of the four-wheel drive T5 2010
consists of the Haldex 4th generation coupling, the
final drive and the optionally available differential
lock. The transmission ratio is 2.466.
The Haldex coupling is integrated into the final drive
and can be renewed separately.
The oil supply to the Haldex coupling and the final
drive comes from two different oil circuits. Two oils
adapted to the particular requirements are used for
lubrication and cooling.
The two oil circuits are sealed off from one another
internally by a double oil seal.
This separates both the oil circuits from one another.
There is a spacer between the two halves of the
double oil seal, in order to guarantee that there will
be a narrow gap. The gap is connected to the
atmosphere by means of a breather hole in order to
equalise the pressure.
In the event of a leak of the pinion, it is possible for
leaking Haldex or final drive oil to reach the outside
via the breather hole.
The double oil seal prevents any mixing between the
two oils.
Mixing would impair the lubrication properties of
both oils, and could result in malfunctions in the final
drive or in the Haldex coupling.
For more information about the
differential lock, refer to self-study
programme no. 333 "4MOTION with
Haldex coupling".
26
Ventilation
Rear axle box
Drive
to left wheel
Differential
Crown wheel with
hypoid gearing
Operating lever for
dog clutch
Drive to
right wheel
Reed contact switches 1-3 for
differential lock F360-F362
For more information about the Haldex
4th generation coupling, refer to self-study
programme no. 414 "4MOTION with
Haldex 4th generation coupling".
Ventilation
Haldex coupling
Pressure unit for
differential lock