Audi Q7 e-tron quattro 4M - Page 41

41
Note
During transportation and when carrying out work on the gearbox, the gear oils (MTF and ATF) may mix via the common
gearbox vent if the gearbox is tilted too far. Furthermore, the gearbox must not be set down onto the ATF oil pan. The ATF oil
pan is not designed to withstand this load. Follow the instructions given in the Workshop Manual.
Combined gearbox ventilation
When heating or cooling the gearbox, the pressure is equalised via
the gearbox vent.
ATF oil pan
The plastic ATF oil pan saves weight. It forms a unit together with
the ATF suction filter.
The gearbox must not be set down onto the ATF oil pan. When the
gearbox is set down, it settles on the e-machine power terminals
and on the ATF oil pan at two points.
The ATF oil pan is not designed to withstand this load. After setting
down the gearbox, observe the instructions for transportation in
the Workshop Manual.
The ATF drain screw has a bayonet catch in place of the usual
thread. It may not be reused and must be replaced after checking
the oil level.
Oil pump for transfer box and front axle drive
The design of the transfer box oil pump and the front axle drive
was first used in the 09E gearbox. The pump of the 09E gearbox
diers only slightly from the pump in the 0D7 gearbox.
The functional principle of the pump is described in greater detail
in SSP 283 (page 70 .) and in SSP 457 (page 37).
The oil pump is driven by the side shaft and provides targeted and
reliable lubrication of all bearings and gears in the transfer box
and in the front axle drive.
Two pipes integrated in the gear case are used for exchange
between the MTF of the front final drive and the MTF of the trans-
fer box.
This design allows for highly ecient lubrication with a minimum
oil level. This significantly reduces churning losses and minimises
foaming of the oil.
1)
STURACO is an oil additive protects against excessive stresses in the centre dierential and thus helps to enhance ride comfort. Pay
attention to exact assignment of gear oils in accordance with the parts numbers in the electronics parts catalogue (ETKA).
649_079
Gearbox ventilation port in hybrid module housing
ATF system vent
Ventilation hose
Vent for transfer box and front axle drive
Leak oil drainage port for
shaft oil seal between ATF
and MTF systems
The front axle drive is vented into
the transfer box via the side shaft
protection tube.
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