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Discussion Starter #1
I have a Australian delivered 2010 BMW 320d Lifestyle (E90) with 72,000km. I have a strange problem with the transmission neutralising while waiting at traffic lights when cold. When I sit for a while and release the brake pedal there is no drive for a second then it thumps into gear. It only last for the first few minutes then stops when it warms up.

I spoke to a transmission specialist who I know, and he says that is how the double clutch transmission works but I spoke to my BMW dealer and they didn’t understand what I was talking about, or the service advisor didn’t (who wasn’t a mechanic).

I have since been told there is a timer setting which can be adjusted to control this problem, i suspect by plugging in a laptop. Does anyone have knowledge of this issue?

Thank you,

Justin
 

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From what I understand, the dual clutch transmission (DCT) is not an option on your car...... The only E9x equipped with it is the 335is, and only in certain years. I could be mistaken, and AU cars might be configured differently (I did a quick Google search and didn't see anything to that effect though).

I have driven DCT cars (as recently as a couple months ago) and I can tell you that I absolutely don't believe the transmission should be thumping into gear, or have a lag when pulling away from a full stop. In my experience driving DCTs, this has not been the case.
 

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Discussion Starter #3
Thanks Yukoner,
I'm certain it is not normal and the dealer just didn't drive it cold enough to reproduce the fault.
Fingers cross somebody else has knowledge of it.
 

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I'm assuming you have the 6-speed automatic transmission.

You probably need to at least drain/replace your automatic transmission fluid and filter. Worst case you may have some broken seals and/or solenoids in there to replace. If you did it on your own it'd be around $300 all in, dealership will likely be more.
 
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