So, is it my Driveshaft or Differential?

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  • wasabinuki
    Advanced Member
    • Jan 2010
    • 117

    #1

    So, is it my Driveshaft or Differential?

    Over the past 6 months this problem has progressively been getting worse, and I've reached the point to where I need to fix it. The sound is speed sensitive and gets louder/faster at speed. There is also a slight vibration in my steering wheel, but I think that's from my front wheels. Check out the video and let me know what you think it could be (:25 second mark you really hear it good):



    Within the last 2 years I have had rebuilt axles and wheel bearing installed, so I doubt it's either of those causing the problem. I also installed a used 4:10 LSD, which was clean inside when I put it on 20K miles ago (I have not looked in it since). My guess is the drive-shaft and/or the differential are the culprits. If anybody has had a similar sound and can help a brother out I'd appreciate it.
  • jlevie
    R3V OG
    • Nov 2006
    • 13530

    #2
    Sounds like differential or transmission to me. But it is really difficult to diagnose sounds long distance. Take the car to a BMW shop and have a pro diagnose it.
    The car makes it possible, but the driver makes it happen.
    Jim Levie, Huntsville, AL

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    • e30rapidic
      R3VLimited
      • Oct 2003
      • 2167

      #3
      check diff and trans fluid level
      '87 325ic, powered by S50.

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