2005 STS V6 jerks from park to drive and drive to reverse.
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Cadillac STS Forum - 2005 through 2012 Discussion, 2005 STS V6 jerks from park to drive and drive to reverse. in Past Cadillac Vehicle Discussion; My Cadillac STS V6 has 115,000 miles and recently it started to jerk when I shift from park to drive ...
  1. #1
    Ricardo Tovar is offline Cadillac Owners Member
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    2005 STS V6 jerks from park to drive and drive to reverse.

    My Cadillac STS V6 has 115,000 miles and recently it started to jerk when I shift from park to drive or drive to reverse. I mainly notice it
    when the car hasn't completely warmed up and I have to take off cause I'm late and don't let it warm up. This worries me cause I love
    this car and want to preserve it as long as possible. Has any one had this problem?

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  3. #2
    06WhiteDiamond is offline Cadillac Owners Fanatic
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    Re: 2005 STS V6 jerks from park to drive and drive to reverse.

    I have the same issue, i believe its simply a motor mount or differential bushing.

  4. #3
    Ricardo Tovar is offline Cadillac Owners Member
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    Re: 2005 STS V6 jerks from park to drive and drive to reverse.

    By any chance have you replaced the motor mount or deferential bushing?

  5. #4
    curtc's Avatar
    curtc is offline OCD - Obsessive Cadillac Disorder
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    Clunks from D to R and vice versa are usually caused by bad diff. bushings.
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  6. #5
    dkozloski's Avatar
    dkozloski is offline Cadillac Owners 10000+ Posts
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    Re: 2005 STS V6 jerks from park to drive and drive to reverse.

    The engine may still be in high idle if you don't give it the 30 or so seconds to idle down after a cold start. Monitor the tach to check on this at startup.
    Don't mess with Binky Bear!


  7. #6
    Ricardo Tovar is offline Cadillac Owners Member
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    Re: 2005 STS V6 jerks from park to drive and drive to reverse.

    Quote Originally Posted by 06WhiteDiamond View Post
    I have the same issue, i believe its simply a motor mount or differential bushing.
    Thank you for that. Have you replaced the motor mount or diff bushing?

    ----------

    Thank you I will look into that.

    ----------

    Ill start waiting a minute or so and see if that makes a diff.

  8. #7
    06WhiteDiamond is offline Cadillac Owners Fanatic
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    Re: 2005 STS V6 jerks from park to drive and drive to reverse.

    Quote Originally Posted by Ricardo Tovar View Post
    Thank you for that. Have you replaced the motor mount or diff bushing?

    ----------

    Thank you I will look into that.

    ----------

    Ill start waiting a minute or so and see if that makes a diff.
    Unfortunately not yet, i just had her in the dealership for a very expensive repair. Soon as i have some spare change laying around i will change the differential bushing depending on price and have them check the motor mounts as well. I feel a bit of vibration on cold start in the morning which leads me in the direction of a failed motor mount.

  9. #8
    curtc's Avatar
    curtc is offline OCD - Obsessive Cadillac Disorder
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    Re: 2005 STS V6 jerks from park to drive and drive to reverse.

    An easy to way to check for a bad motor mount is to open the hood, have someone else get in the driver seat and rev the engine a bit. If you see a lot of movement when the engine revs there's a good chance there's one or more bad mounts.

    I had my LF mount replaced last year sometime...Think it was about $450 all said and done. (local shop, not a stealership) I heard a distinctive pop/clunk when taking off from a complete stop if I was a little heavier on the throttle.
    Past Cadillac's

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  10. #9
    Ricardo Tovar is offline Cadillac Owners Member
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    Re: 2005 STS V6 jerks from park to drive and drive to reverse.

    Thank you guys for all the comments. I feel better knowing what it might be and can talk to my local mechanic to get it fixed.

  11. #10
    ARMY_STS is offline Cadillac Owners Member
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    Re: 2005 STS V6 jerks from park to drive and drive to reverse.

    Did you ever have this fixed? I recently bought an 06 STS and mine does the same exact thing. Was wondering what it could be.

  12. #11
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: 2005 STS V6 jerks from park to drive and drive to reverse.

    It's usually a bad differential mount bushing.

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