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  #1  
Old 06-25-2019, 05:58 PM
isstatu1 isstatu1 is offline
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Car Shudders at 1500 rpm

My 2010 750li often shudders and shakes when it gets to 1500 rpm. At firat I thought it was the tranny, but after I shifted in manual it does it on the 2nd as well as 1st gear. It doesn't do it when I step on the gas, or when I'm really easy on it. So basically it does it when accelerating normally. When it gets to speed it doesn't do it anymore, just when starting to move. No codes or any lights on the dash. Any ideas?
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  #2  
Old 06-25-2019, 08:03 PM
HerbP HerbP is offline
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It could possibly be the transmission is low on fluid, it will not signal a code. The fluid usually gets cooked from heat, then it starts getting low on fluid. The fluid should be changed at 50k mile intervals. Usually you will get a transmission warning when the fluid pressure gets low, due to the Mechatronic Adapter Sleeve gets hard, & does not seal properly.
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Old 06-26-2019, 05:00 AM
isstatu1 isstatu1 is offline
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Should I change anything else in the transmission while I'm in there?
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Old 06-26-2019, 07:12 AM
rafiqi rafiqi is offline
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Might be a ignition coil about to go out. Try getting a scan.
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  #5  
Old 07-02-2019, 07:29 PM
isstatu1 isstatu1 is offline
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Did the spark plugs and ignition coils. Nothing changed. Will try to do the tranny flush next.
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Old 07-02-2019, 08:55 PM
Robin750 Robin750 is offline
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Quote:
Originally Posted by isstatu1 View Post
Will try to do the tranny flush next.
Drain and fill, do not flush. Make sure to change the pan when you get this done and that the shop knows the procedure (and has the diagnostic equipment) to fill the fluid at the right temperature.
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Old 07-03-2019, 03:03 AM
isstatu1 isstatu1 is offline
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Got it, thank you!
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  #8  
Old 07-05-2019, 08:58 AM
isstatu1 isstatu1 is offline
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Is there anything else besides the pan that should be changed while the fluid is being changed?
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Old 07-05-2019, 09:16 AM
Robin750 Robin750 is offline
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As Herb mentioned, the mechatronics sleeve and adapter seals can also be a source of problems, though those usually cause more serious problems or trigger fault codes due to low fluid pressure.

The mechatronics has to be removed to replace these seals so there will be some more labor involved, but if you've got around 100K miles, it might not be a bad idea to replace these as a preventative measure since you've already got the fluid drained and pan off. Make sure the shop is familiar with these transmissions as reinstalling it incorrectly can cause serious problems or damage.

Here's a relevant thread about these seals:

https://www.bimmerfest.com/forums/sh...d.php?t=995002
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Last edited by Robin750; 07-05-2019 at 09:18 AM.
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Old 07-25-2019, 06:09 PM
isstatu1 isstatu1 is offline
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Did the service for the transmission. The shop said the fluid was low, but it still shudders at 1500rpm. Any more ideas?
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  #11  
Old 07-25-2019, 10:37 PM
Robin750 Robin750 is offline
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Did they reset the valve body adaptations? If so, the transmission should shift rough for a couple hundred miles.
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Old 07-26-2019, 05:20 AM
isstatu1 isstatu1 is offline
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Originally Posted by Robin750 View Post
Did they reset the valve body adaptations? If so, the transmission should shift rough for a couple hundred miles.
It's possible they did not. Is there a specific driving procedure after the adaptation, or is it just a button click in ISTA? I found instructions for an older Exx model that has instructions of a particular acceleration procedure after a reset that has to be repeated 9 times, but nothing for the F02 model.
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  #13  
Old 07-26-2019, 09:10 AM
Robin750 Robin750 is offline
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Quote:
Originally Posted by isstatu1 View Post
It's possible they did not. Is there a specific driving procedure after the adaptation, or is it just a button click in ISTA? I found instructions for an older Exx model that has instructions of a particular acceleration procedure after a reset that has to be repeated 9 times, but nothing for the F02 model.
It's in the EGS ECU functions. There is no special driving procedure needed, just drive the car normally at varying speeds so it can determine the adaptations.
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Old 07-29-2019, 03:34 PM
isstatu1 isstatu1 is offline
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Did the adaptation. I don't notice any changes so far. Still shudders, but it feels like it gets pretty high in the RPM range to do the shift.. It feels like it's hesitating a little bit. I'm adding a screencap from ISTA before the adaptation.
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