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Thread: Clunk noise when accelerating from stop

  1. #1
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    Clunk noise when accelerating from stop

    I have a 2007 escalade ext and I'm experiencing a clunk noise when I accelerate from a stop or even sometimes when slowing down it seems like it's only doing it on low speed not sure if it's tranny or drive axle I also noticed that when I slow down the Rpms bounce up and down not sure if this is normal went from a f150 to an escalade.?


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  3. #2
    bigksone's Avatar
    bigksone is offline Cadillac Owners Fanatic
    Automobile(s): 2008 ESV, 2004 Escalade
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    The clunking noise could be a bad motor mount. My drivers side mount needed to be replaced at around 55K miles. A fairly common problem on these trucks.

  4. #3
    LaVaDog is offline Cadillac Owners Member
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    Re: Clunk noise when accelerating from stop

    I recently purchased an 07 and learning about how problemactic it is.....I have been nervous since, to the point of not enjoying the new vehicle I noticed from time to time a clunck as well. With all the tranny talk, I have it in my head that something isn't right with the transmission. I have told some buddies of mine about the "clunk" and I said I wasn't sure if it is the transmission, driveline, U joints. Basically just want to say thank you for this post. Haha....I also went from an F-150 to a Escalade!

  5. #4
    Punmax is offline Cadillac Owners Enthusiast
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    Re: Clunk noise when accelerating from stop

    Probably the left motor mount. Put the truck in drive, step on both the gas and the brake and see if you can replicate the clunk. If you can, it's the motor mount.

  6. #5
    big rob 1's Avatar
    big rob 1 is offline Cadillac Owners Fanatic
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    Re: Clunk noise when accelerating from stop

    anyone have the part # for the motor mount?

  7. #6
    SpyShops NY's Avatar
    SpyShops NY is offline Cadillac Owners Enthusiast
    Automobile(s): 1999 Escalade, 2004 CTS, 2003 ESV, Now 2008 Escalade
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    I would have someone professional like the deal do it, tell negotiate with them

  8. #7
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    I'm gone try that today

  9. #8
    SpyShops NY's Avatar
    SpyShops NY is offline Cadillac Owners Enthusiast
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    Sounds like someone was misusing the truck I changed mines at 100k lucky me it broke at 99,500 so I got it fixed for free

  10. #9
    bigksone's Avatar
    bigksone is offline Cadillac Owners Fanatic
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    Quote Originally Posted by big rob 1
    anyone have the part # for the motor mount?
    Try 15854939

  11. #10
    wesyder's Avatar
    wesyder is online now Cadillac Owners Connoisseur
    Automobile(s): 08 Escalade ESV awd, 05 Yukon Xl Denali awd, 06 SRX sold
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    Quote Originally Posted by bigksone
    Try 15854939
    i show that number as well on my last motor mount job

  12. #11
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    Re: Clunk noise when accelerating from stop

    Quote Originally Posted by shemick View Post
    I have a 2007 escalade ext and I'm experiencing a clunk noise when I accelerate from a stop or even sometimes when slowing down it seems like it's only doing it on low speed not sure if it's tranny or drive axle I also noticed that when I slow down the Rpms bounce up and down not sure if this is normal went from a f150 to an escalade.?
    Hello shemick,

    If you're interested in having a Cadillac dealership check your vehicle for this clunking noise please let us know. We definitely want you to be able to drive your vehicle without any issues occurring, and would like to help in possibly resolving this for you. If interested, please private message us your full contact information, VIN, mileage, and preferred dealership.

    Thank you,

    Amber N. (assisting Laura)
    Cadillac Customer Care

  13. #12
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    Thanks
    Last edited by shemick; 02-04-14 at 12:23 AM.

  14. #13
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    Re: Clunk noise when accelerating from stop

    Quote Originally Posted by LaVaDog View Post
    I recently purchased an 07 and learning about how problemactic it is.....I have been nervous since, to the point of not enjoying the new vehicle I noticed from time to time a clunck as well. With all the tranny talk, I have it in my head that something isn't right with the transmission. I have told some buddies of mine about the "clunk" and I said I wasn't sure if it is the transmission, driveline, U joints. Basically just want to say thank you for this post. Haha....I also went from an F-150 to a Escalade!
    Hello LaVaDog,

    I apologize that you are experiencing this noise with your transmission as well. If you are planning on taking your vehicle into a dealership to have this looked into, I would be more than happy to assist you in setting up an appointment and working with the dealership. Please feel free to private message me with your name, contact info, VIN, mileage, and dealership that you have been working with. If you are unable to private message me, you can also email me at socialmedia@gm.com with “ATTN GREG” in the subject line. I look forward to hearing from you soon.

    Gregory W.
    Cadillac Customer Care

  15. #14
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    Quote Originally Posted by Punmax
    Probably the left motor mount. Put the truck in drive, step on both the gas and the brake and see if you can replicate the clunk. If you can, it's the motor mount.
    Is there a reason why you have to press the brake and the gas at the same time can't you just put it in neutral and step on the gas? Thats what I tried and the engine didn't clunk or really move.

  16. #15
    Punmax is offline Cadillac Owners Enthusiast
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    Re: Clunk noise when accelerating from stop

    Quote Originally Posted by shemick View Post
    Is there a reason why you have to press the brake and the gas at the same time can't you just put it in neutral and step on the gas? Thats what I tried and the engine didn't clunk or really move.
    With the truck in neutral, the engine isn't under any load. I tried pressing on the gas pedal with my truck in neutral, and couldn't produce the thud that is present when in drive.

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