04-20-2017, 12:35 PM | #1 |
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Tranny thump sound - help
Hi Guys,
Last start I started to notice a thump when I lightly press down on my gas like the tranny is kicking in before acceleration. Maybe I just didn't notice that before, but is that normal? When I slowly press down on the gas and ease into it it doesn't happen, only when I push down fast and it kicks in hard and I hear a thump and then there are no other issues or shifting problems. Please help, thanks.
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04-20-2017, 12:57 PM | #2 | |
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04-20-2017, 01:22 PM | #3 |
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Is your Auto Start/Stop active?
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04-20-2017, 02:15 PM | #5 |
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04-20-2017, 03:06 PM | #6 |
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Yup me 2
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04-20-2017, 03:19 PM | #7 |
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Yes... There is an actuator over there and that noise is coming from that actuator every time the ASS (Automatic Start/Stop) is engaged.
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04-20-2017, 04:14 PM | #8 |
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Yes that sounds like it. It only happens when I press on the gas lightly but fast if that makes sense.
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04-20-2017, 04:16 PM | #9 |
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Do you mean the button next to start up? Mine isn't on but it's just in 3 mode sport plus and light and fast on the gas it clunks but then when I ease on the gas or press really it doesn't do anything.
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04-20-2017, 04:27 PM | #10 | |
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04-20-2017, 07:05 PM | #11 |
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No, that's not it, lol. But I did check it right after it happened.
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04-20-2017, 07:15 PM | #12 | ||
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When I let go of the brake and go to press the gas and press it, it clunks for a second before going, and only upon light fast pressing.
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04-20-2017, 11:02 PM | #13 |
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I meant turn ASS off ... NO Auto Start/Stop
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04-22-2017, 07:50 AM | #14 |
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a few less posts in here and a lot quieter today! Padfan9 - good luck diagnosing the issue, if there is one. With M cars, very often the answer is to just drive it harder - they are meant to be driven not coddled!
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04-22-2017, 10:18 AM | #15 |
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I remember when I first got the car and used to shift in S3 or M3 mode and it would cause some thunks between shifts. Not sure if this is the same kind of funk.
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04-24-2017, 08:34 AM | #16 | |
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04-24-2017, 04:27 PM | #17 | ||
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I went and test drove a new M6 this weekend and it also made the same sound.
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04-25-2017, 02:41 AM | #18 |
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Just to lay this one to bed, i have an M5 f10 comp pack BMW loan car whilst my M6 is being repaired, it makes the same noise, as does a close relatives stock f10 M5, they are all 2016 manufactures cars.
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04-25-2017, 12:40 PM | #19 |
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Awesome, thank you!
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04-28-2017, 10:54 PM | #20 |
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04-28-2017, 11:58 PM | #21 |
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