The problem of “stalling” in the automatic transmission in BMW – how to solve it?

BMW driver’s question

My BMW has already had the oil changed in the automatic transmission using the dynamic method. Both before and after the change, the problem is “dragging” (jerking) of the gear from one to two and from two to three at about 1500 rpm.

Could this be a software update issue? Or, however, some mechanical fault? He will add that the current service found no mechanical fault before the dynamic oil change in the transmission. In addition, a transmission adaptation was done.

The problem concerned a 2009 model BMW 330 xDrive E91 with 500,000 km, but it happens in other models as well. The following comments apply to all BMW models with automatic transmission.

BM Cars service response

The described problem with gear stalling is not necessarily a transmission fault. Very often it is caused by a fault on the engine side.

Information about the need to shift gears is transmitted to the transmission controller when the vehicle reaches the right speed at the right time. If the car has a problem getting the right power/torque, or the speed signal is disturbed or undelivered to the transmission controller – the gear will not shift. This will be experienced as so-called gear stalling – the engine reaches high revs, but the transmission does not shift to the next gear.

Changing the transmission’s software is not the solution to fix this fault.

Changing the oil in the transmission, although advisable due to the mileage, is also not a recipe for fixing such a defect.

A full diagnostic of the vehicle is necessary for an accurate diagnosis.

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