View Poll Results: Have you ever heard this noise from your M2? | |||
yes | 4 | 40.00% | |
no | 6 | 60.00% | |
Voters: 10. You may not vote on this poll |
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02-20-2024, 12:19 PM | #1 |
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Strange periodic noise from DCT gearbox in Neutral!
Dear All, I'm searching for the reason of this sound what you can hear on the video, the car is an M2 N55 with DCT. Many of the M2's with dct having this sound, but also there is agroup where there is no sound, so it's confusing :/ The issue: The sound comes ONLY in neutral, and loud only after cold start, But its coming exactly 7 times in each minutes after 50 sec silence, 7 noise 50 sec silent and so on, if i change to gear 1 or R, the sounds stops immediatelly, and only comes again if i take it back to N, so its kind like expected/programmed. I have NO leaking on my dct, and there was no leaking before as well but ofc i don't know the oil level currently! Question 1: Cold it be the jet pump? 28107842838 Thanks for your help / comments Last edited by Tibi_M2; 02-20-2024 at 12:33 PM.. |
02-22-2024, 09:37 AM | #6 |
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The cold start its not a big factor in this, Neutral is in a dtc i think, maybe in manual as well, but was not able to test with manual, so even the car is warm enough, the sound is coming but absolutelly not loud, but still possible to hear some vaccum/pump noise from under!
And the funny fact is, that it's not coming always, but i was not able to figure out all conditions yet! But thanks, I appreaciate it! |
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02-22-2024, 09:43 AM | #7 |
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To confirm ... my car is a DCT and it was in N on the cold start
Also checked when returning from a two hour run out, idling in N in the garage and again ... no noise Hope that you discover the cause, please keep us informed |
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02-22-2024, 11:04 AM | #8 | |
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Next month i will check it further, but right now im on a business trip Thanks again for your well detailed check! |
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04-27-2024, 03:16 PM | #9 |
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Just to confirm my DCT OG LCI also does this. I posted in the U.K. owners fb page about this the other day to try and figure out what it is. A few people have commented saying theirs do it and another is having the noise looked at at their local indy soon
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04-27-2024, 05:25 PM | #10 |
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Drives: 2018 M2 6MT
Join Date: Feb 2020
Location: San Francisco Bay Area
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My 6MT M2 does not exhibit this noise. Since I think you’re wanting to limit the poll responses to folks with DCT M2’s, I didn’t indicate a “no” on the poll.
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04-28-2024, 07:31 PM | #12 |
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Drives: M2C
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Location: Seattle
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I have no idea but these are some questions that might be helpful to others
1. Do you remember when this first started happening? 2. Does the noise happen after first starting the car? Or does the car need to be driven first? Similarly, does it go away after driving for a while? 3. How many miles on the car? Has it had a transmission fluid change? |
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04-29-2024, 05:46 AM | #13 | |
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1) I only noticed this in mine when I saw someone post a video of theirs doing it, so I listened for it on mine. Mileage was around 51k miles when I spotted it 2) Mine does it when first starting the car but also after a long drive 3) Currently at 54k miles and no DCT service, although I will be having it done next year or later this year |
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