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Thread: Vibration/Noise when accelerating hard from Idle

  1. #1
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    Default Vibration/Noise when accelerating hard from Idle

    I'm getting a vibration/growling noise on hard acceleration. I can feel it in my feet when I get on it hard. Did a three inch lift about three months ago had drive line vibration that was resolved with a transfer case drop. This is a totally different noise that just started last week. I checked that all bolts I touched when I installed the lift were tight. Checked motor mounts and tranny mount all looks good. Going to check flex plate and converter next. If anyone has any ideas of anything else I could check I would greatly appreciate it. Thanks

  2. #2
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    Default Re: Vibration/Noise when accelerating hard from Idle

    The first thing I would look at is the exhaust hitting something. That and the torque converter bolts are the most common things
    230 hp 4.3L Chevy
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  3. #3
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    Default Re: Vibration/Noise when accelerating hard from Idle

    Checked exhaust everything is tight and nothing is touching. Going to check converter bolts next.
    Last edited by Heckler1963; 06-18-2016 at 09:25 PM.

  4. #4
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    Default Re: Vibration/Noise when accelerating hard from Idle

    drop front drive shaft and go for a drive ..................
    keeping it red........

    I DRIVE A BARBIE JEEP

    Quote Originally Posted by XJ4IV
    .... lol Im a jerk tonight!
    Originally Posted by bigjim350 View Post
    Think I would go that crazy too if my Jeep turned white

    http://www.youtube.com/watch?v=XGg0C...eature=related


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    Default Re: Vibration/Noise when accelerating hard from Idle

    Does the frequency of the vibration/growling seem to track the rpm ?

    Condition of Front drive axle u-joints, unit bearings, and ring and pinion ?
    Last edited by slvmart; 06-19-2016 at 04:30 AM.

  6. #6
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    Default Re: Vibration/Noise when accelerating hard from Idle

    No it doesn't seem to follow RPMs it sounds more like drive train noise.

  7. #7
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    Default Re: Vibration/Noise when accelerating hard from Idle

    Which transfer case do you have?
    230 hp 4.3L Chevy
    Built 4L60E with manual lockout
    Atlas 4 speed
    Griffin radiator
    On board air
    Warn 9.5ti on custom bumper
    7.5" RE front and bastard pack rear on custom long arms
    30 gal gas tank
    lockers
    And a bunch of other stuff

  8. #8
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    Default Re: Vibration/Noise when accelerating hard from Idle

    Not sure. How can I tell?

  9. #9
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    Default Re: Vibration/Noise when accelerating hard from Idle

    If it says "Full time" on the indicator for the t-case you have a np 242, if not then it's a np231. Found this handy image online to aid in my explanation.Name:  uploadfromtaptalk1466751854828.jpg
Views: 38
Size:  326.5 KB

    Sent via messenger pigeon. I talk, he types.

  10. #10
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    Default Re: Vibration/Noise when accelerating hard from Idle

    Thanks I guess I have an NP231.

  11. #11
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    Default Re: Vibration/Noise when accelerating hard from Idle

    UPDATE: I dropped front driveshaft checked u-joints and took it for a ride, still had noise. Checked all of the flex plate bolts were tight, still have noise.
    Last edited by Heckler1963; 06-26-2016 at 06:19 PM.

  12. #12
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    Default Re: Vibration/Noise when accelerating hard from Idle

    Check the transmission mount. Someone had posted a video of, what I feel is your issue, and it ended up being a worn transmission mount. Mine had the vibration(not so much a noise) and that's what it was.

  13. #13
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    Default Re: Vibration/Noise when accelerating hard from Idle

    Thanks mine looks good but I will try changing it.

  14. #14
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    Default Re: Vibration/Noise when accelerating hard from Idle

    Changed the transmission mount and the vibration is gone. Thanks very much.

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