BMW E90 automatic transmission adaptation reset
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What does resetting the adaptations on an E90 automatic do?
The reset returns the gearbox's valve control to its basic values, and the gearbox learns new values while driving. Right after the reset the shifts can be jerky until the values have settled.
Should the adaptations be reset when changing the gearbox oil?
A reset is recommended together with an oil change, and in several cars it softened the shifts. The effect is not certain: if the jerking is caused by a mechanical fault, a reset alone does not fix it.
When does a reset help if there is a fault in the gears?
If the car reports that an adaptation value has exceeded its limit and no fault code is found, a reset and the driving afterwards can fix the situation. For jerking, also check the gearbox software version, because the need for an update depends on the engine type.
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