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    1. 08-24-2013, 07:18 PM #1
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      6AT Transmission Whine

      Wanting to know who else has an audible transmission whine on deccel and moderate acceleration at low RPM (Alpina D) when wind noise is low. Maintaining a constant speed the sound isn't heard. Car has been doing this for awhile now and I originally thought it was my differential, however when the car is in N the sound goes away. No slippage, temperatures are all in check, and no other adverse effects. Maybe it's a normal characteristic of the trans?

      Thanks.
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    2. 08-24-2013, 09:41 PM #2
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      Click here to enlarge Originally Posted by E90Company Click here to enlarge
      Wanting to know who else has an audible transmission whine on deccel and moderate acceleration at low RPM (Alpina D) when wind noise is low. Maintaining a constant speed the sound isn't heard. Car has been doing this for awhile now and I originally thought it was my differential, however when the car is in N the sound goes away. No slippage, temperatures are all in check, and no other adverse effects. Maybe it's a normal characteristic of the trans?

      Thanks.
      Yep, me. 95K miles. Not super noticeable but lately I have thought the whine was becoming more evident. Nothing else seems amiss.

      Fluid and filter changed at about 65K miles. Used Mercon SP for the fluid.
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    3. 08-25-2013, 10:37 AM #3
      JStang
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      My fiances 328I was getting a whining noise similar to what you are describing. Dealer determined that her dif. Was on the way out. Replaced it and fixed the problem.
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    4. 08-25-2013, 11:21 AM #4
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      Click here to enlarge Originally Posted by JStang Click here to enlarge
      My fiances 328I was getting a whining noise similar to what you are describing. Dealer determined that her dif. Was on the way out. Replaced it and fixed the problem.
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      Out of warranty as of 7 days ago.
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    5. 08-25-2013, 10:35 PM #5
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      Guess it's a sign that you should get a real LSD -- Wavetrac, OS Giken, etc
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    6. 08-25-2013, 11:50 PM #6
      mikolo-n54
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      I have it as well 74k miles, pretty audible when cold but when warm I don't get much whine/whistle.
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    7. 08-26-2013, 02:24 AM #7
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      Click here to enlarge Originally Posted by benzy89 Click here to enlarge
      Guess it's a sign that you should get a real LSD -- Wavetrac, OS Giken, etc
      Why isn't contstant then in situations if it's the diff though?
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    8. 08-26-2013, 06:58 AM #8
      JC335xi
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      Click here to enlarge Originally Posted by Sticky Click here to enlarge
      Why isn't contstant then in situations if it's the diff though?
      My guess is the sound goes away in neutral because the diff is no longer under load.
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    9. 08-26-2013, 08:09 AM #9
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      1 out of 1 members liked this post. Yes Reputation No
      I have an original E82 AT sattelite lying around in the attic somewhere if you're interrested.
      22k miles on it.
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    10. 08-26-2013, 10:21 AM #10
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      Thanks for the offer. I will PM you later. Noise is the diff like I originally suspected.
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    11. 08-26-2013, 11:44 AM #11
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      Click here to enlarge Originally Posted by JC335xi Click here to enlarge
      My guess is the sound goes away in neutral because the diff is no longer under load.
      Yes that would be my guess as well but he doesn't seem to have consistency to this. Regardless, he wants to swap the diff.
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