BMW F97 - Page 26

F97/F98�Complete�Vehicle
4.�Powertrain
22
F97/F98,�transmission�oil�cooling
Index Explanation
1 M�automatic�transmission
2 Thermostat
3 Aluminum�transmission�sump
4 Transmission�oil�return
5 Transmission�oil�feed
6 Transmission�oil�cooler�(oil-to-air�heat�exchanger�principle)
Some�of�the�external�pipes�and�hoses�carrying�transmission�oil�to�the�supplementary�transmission�oil
cooler�have�had�their�cross-sectional�area�optimized.�This�results�in�a�greater�oil�flow�rate,�translating
into�more�efficient�cooling�of�the�M�automatic�transmission.
The�thermostat�of�the�transmission�oil�cooler�starts�opening�at�76°C�(169�°F)�and�is�fully�open�at
96°C�(205�°F).
4.2.3.�M�gear�selector�lever/M�GWS
The�M�automatic�transmission�is�operated�using�the�M�gear�selector�lever�(M�GWS)�or�the�shift
paddles�on�the�steering�wheel.
The�gear�selector�switch�used�on�the�F97/F98�is�a�combined�M�gear�selector�switch�with�integrated
Drivelogic�switch�and�parking�lock�button�as�familiar�from�the�BMW�M5.
The�M-specific�shift�pattern,�as�used�for�the�M�double-clutch�transmissions,�was�retained�for�the
M�gear�selector�switch.