E70, E71, F25: Oil Leak from Transfer Case - from service bulletin SI B24 01 13 (3/2013)
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Applies to the following models:
- E70
- E71
- F25
Situation:
Oil is leaking from the transmission area, or oil seepage is noticed from the transmission/transfer case area during a service.
Cause:
The leak can be misdiagnosed as a transmission fluid leak from either the mechatronics sleeve or transmission oil pan. The leak is actually coming from the transfer case (input or output shaft seal).
Procedure:
Before attempting to perform any repairs, check the fluid level in both the transmission and transfer case.
If the level is low in the transfer case, repair as necessary.