Slamming sound upon acceleration
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Cadillac STS-V Series Forum Discussion, Slamming sound upon acceleration in Cadillac V-Series Forums; Just about every time I step on the gas to accelerate I hear a loud slam under my car. Sounds ...
  1. #1
    rwwrrr is offline Cadillac Owners Member
    Automobile(s): STS-V 2008
    Join Date
    Apr 2010
    Age
    46
    Posts
    20

    Slamming sound upon acceleration

    Just about every time I step on the gas to accelerate I hear a loud slam under my car. Sounds like its coming from the U joint in the drive shaft. Any thoughts?

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  3. #2
    PGA2B's Avatar
    PGA2B is offline Cadillac Owners Connoisseur
    Automobile(s): Black Raven STS V
    Join Date
    Jun 2009
    Location
    Surprise, AZ
    Posts
    2,507

    Re: Slamming sound upon acceleration

    Bad Carrier Bushing?

  4. #3
    bobs-sts-v's Avatar
    bobs-sts-v is offline Cadillac Owners Fanatic
    Automobile(s): STS-V
    Join Date
    Feb 2007
    Location
    Naperville, IL
    Posts
    392

    Re: Slamming sound upon acceleration

    I had to have the driveshaft on my 06 replaces at about 20K. Could be U joints or the driveshaft. Mine sounded like someone pounding under the back seat right under the hump. Been fine ever since.

    Bob

  5. #4
    BlownV is offline Cadillac Owners Fanatic
    Automobile(s): 2011 CTS-V
    Join Date
    May 2010
    Posts
    211

    Re: Slamming sound upon acceleration

    Differential bushing is known to wear out quickly in these cars. I have replaced mine twice in 85k. The second time I put in the urethane one from creative steel and used their tool to do it so that I could handle the job myself and save the $800 the dealer wanted. Highly recommend the upgrade even if yours is okay.

  6. #5
    AriGold. is offline Cadillac Owners Fanatic
    Automobile(s): STS-V
    Join Date
    Jan 2011
    Location
    Tulsa, Oklahoma
    Posts
    143

    Re: Slamming sound upon acceleration

    I did what BlownV did when I bought a new drive shaft. Highley recommend for anyone trying to have fun in these cars.

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