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Thread: jackhammer noise on deceleration

  1. #1
    Join Date
    Feb 2018
    Location
    Prov,RI
    Posts
    1
    My Cars
    08 535xi, 08 LS460

    Unhappy jackhammer noise on deceleration

    All of a sudden, I started hearing a jackhammering noise underneath the car as I was decelerating/coasting. It is more pronounced going downhill... I don't really hear it while
    driving... Engine sounds smooth , its more of a drivetrain noise and it seems to be toward the front of the car.. it's louder based on speed...

  2. #2
    Join Date
    Mar 2008
    Location
    Napa, Ca
    Posts
    1,796
    My Cars
    1987 M6
    Yikes! I'd take a look at the u-joints on all driveshafts.

    Jose
    1987 M6
    Livin the dream!

  3. #3
    Join Date
    Dec 2002
    Location
    Sarasota, FL
    Posts
    3,500
    My Cars
    991.1 / 958.2
    Do you have an AWD model?

    Sent from my VS988 using Tapatalk

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