Auto transmission question

palitsyn · 06-26-2014, 11:43 AM

I have a 2006 BMW 330i (e90) with an auto transmission and I was wondering if you could help me understand if the following is normal for the type of transmission I have.

Sometimes, under hard acceleration from stand still, the car seems to hold on to the gears longer revving up and i then get a sort of kick in the back feeling when it finally shifts. Also, under very light acceleration, it seems to hold on to lower gears for longer than necessary to the point, where the car starts to almost slow down at which point it shifts up and again I get the kick although it's not quite as hard as under hard acceleration.

In regards to the hard acceleration and I am not talking about flooring it, I have noticed the following: when I let off the brake, I get two behaviours 1) the car jerks forward 2) the car stays still for 1/2 a second and then starts to creep forward. In the first scenario, accelerating hard will cause the issue, where as under the second scenario, the acceleration will be smooth.

The transmission has been serviced recently with the oil and the sump changed. BMW tell me it's normal.

GoRomeo · 06-26-2014, 02:03 PM

Try to reset adaptations and see if that makes any difference.

palitsyn · 06-26-2014, 04:00 PM

Quote:

Originally Posted by GoRomeo

Try to reset adaptations and see if that makes any difference.

If you mean the procedure being talked about on the web, then it only makes it slightly smoother for a single journey. BTW, I have recently found out, that putting the key in, then pressing the start button (without touching any pedals) and waiting for around 10 seconds does the exact same thing.

jer335 · 06-30-2014, 11:42 AM

IIRC, putting the key in the slot, stepping on the gas for 10 seconds resets the throttle body adaptations. In order to reset the transmission adaptations, you would either need an INPA software or a BT tool. Two different resets from what I've read on this forum. From the transmission symptoms you're describing, it doesn't sound too uncommon.

palitsyn · 06-30-2014, 02:43 PM

Quote:

Originally Posted by jer335

IIRC, putting the key in the slot, stepping on the gas for 10 seconds resets the throttle body adaptations. In order to reset the transmission adaptations, you would either need an INPA software or a BT tool. Two different resets from what I've read on this forum. From the transmission symptoms you're describing, it doesn't sound too uncommon.

I see. When you say "doesn't sound to uncommon", do you mean it could be normal and I am just being picky?

jer335 · 06-30-2014, 02:49 PM

I'm pretty picky too. I've done a bunch of research on this forum regarding the transmission because at times, my transmission seems to hold the gear longer than I would want it to. However this is most common during slow acceleration like in parking lots etc. I've gotten used of it and just adjusted my driving to get around it.

palitsyn · 06-30-2014, 02:58 PM

Quote:

Originally Posted by jer335

I'm pretty picky too. I've done a bunch of research on this forum regarding the transmission because at times, my transmission seems to hold the gear longer than I would want it to. However this is most common during slow acceleration like in parking lots etc. I've gotten used of it and just adjusted my driving to get around it.

Great! Sounds like the plan. Thank you!

06-26-2014, 11:43 AM	#1
palitsyn Second Lieutenant 49 Rep 230 Posts Drives: E90 330i SE (2006) Join Date: Nov 2013 Location: London, UK iTrader: (0)	Auto transmission question I have a 2006 BMW 330i (e90) with an auto transmission and I was wondering if you could help me understand if the following is normal for the type of transmission I have. Sometimes, under hard acceleration from stand still, the car seems to hold on to the gears longer revving up and i then get a sort of kick in the back feeling when it finally shifts. Also, under very light acceleration, it seems to hold on to lower gears for longer than necessary to the point, where the car starts to almost slow down at which point it shifts up and again I get the kick although it's not quite as hard as under hard acceleration. In regards to the hard acceleration and I am not talking about flooring it, I have noticed the following: when I let off the brake, I get two behaviours 1) the car jerks forward 2) the car stays still for 1/2 a second and then starts to creep forward. In the first scenario, accelerating hard will cause the issue, where as under the second scenario, the acceleration will be smooth. The transmission has been serviced recently with the oil and the sump changed. BMW tell me it's normal. __________________ '06 330i (n52) SE AT Last edited by palitsyn; 06-26-2014 at 03:57 PM..
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06-26-2014, 02:03 PM	#2
GoRomeo Brigadier General 964 Rep 3,854 Posts Drives: 330i, 135i Join Date: Feb 2006 Location: San Diego CA iTrader: (0) Garage List 2008 BMW 135i [9.50] 2006 330i [6.75]	Try to reset adaptations and see if that makes any difference.
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06-30-2014, 11:42 AM	#4
jer335 Private 9 Rep 66 Posts Drives: 335i Join Date: Dec 2013 Location: San Jose, CA iTrader: (0)	IIRC, putting the key in the slot, stepping on the gas for 10 seconds resets the throttle body adaptations. In order to reset the transmission adaptations, you would either need an INPA software or a BT tool. Two different resets from what I've read on this forum. From the transmission symptoms you're describing, it doesn't sound too uncommon.
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06-30-2014, 02:49 PM	#6
jer335 Private 9 Rep 66 Posts Drives: 335i Join Date: Dec 2013 Location: San Jose, CA iTrader: (0)	I'm pretty picky too. I've done a bunch of research on this forum regarding the transmission because at times, my transmission seems to hold the gear longer than I would want it to. However this is most common during slow acceleration like in parking lots etc. I've gotten used of it and just adjusted my driving to get around it.
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