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'clunk' sound when descelerating

Discussion in 'Model S' started by Caloncho, Nov 21, 2016.

  1. Caloncho

    Caloncho LongerTelomeres?

    Joined:
    Nov 18, 2013
    Messages:
    89
    Location:
    NewYork USA
    Hi all,

    Since last week I have a clunky (imagine throwing a heavy bolt into a metal paperbasket lined with paper towel) sound when the gas pedal is released and regen engages. There also may be a slight clunk when regen is switched back to accelerating. Not loud but noticeable.

    Opinions please,

    Cal

    PS. kindly redirect if forum selection is incorrect.
     
  2. scottm

    scottm Active Member

    Joined:
    Jun 13, 2014
    Messages:
    1,713
    Location:
    Canada
    Known issue. After the bigger clunk of your wallet hitting the floor when you first buy Tesla.

    Get service to bolt your motor back in place with a new mount.
     
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  3. steve841

    steve841 Active Member

    Joined:
    Jan 17, 2010
    Messages:
    1,485
    Location:
    Ft. Lauderdale, FL
    +1 ^^^
     
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  4. PaulusdB

    PaulusdB Mayor Gnomus Vintage Limb

    Joined:
    Jul 12, 2013
    Messages:
    3,649
    Location:
    Europe
    From my last service invoice:
    Concern: Customer states that when he drives at lower speed, he has the impression that there is a "clunck" in the drive train of his car.
    Corrections: Rear drive unit general diagnosis
    Confirmed customer state (sic)
    A clunck noise is audible, coming from the rear of the vehicle. The noise is coming from the drive unit. Needs replacement to resolve issue.
    Corrections: Drive Unit - Rear - Large
    Replaced rear drive unit, tested and confirmed correct operation.
    Corrections: Halfshafts - lubricate at hubs LH/RH
    Lubricated rear drive shafts at hubs
    Corrections: Perform validation test drive
    Performed validation test drive and confirmed that the vehicle is as designed.
    Corrections: Install LH/RH harness connector covers
    Replaced electric park brake connector covers
    Total Labor & Miscellaneous Items
    Pay Type: Warranty​
    FYI: The mentioned confirmation of my 'clunck noise' statement consisted of the service employee reversing my car out of the parking spot for one or two feet.
     
  5. mknox

    mknox Well-Known Member

    Joined:
    Aug 7, 2012
    Messages:
    8,975
    Location:
    Toronto, ON
    Known and long discussed issue around here. I've had several drive unit replacements and several driveshaft and wheel hub repairs to boot. I'm okay now, but hope it holds out.
     
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  6. gaswalla

    gaswalla P4201/85/airsusp/pano/19i

    Joined:
    Sep 23, 2012
    Messages:
    1,423
    Location:
    San Diego
    Hi, I have a high mileage Model S (>130k mi). I took it in for a similar issue: (it was not the drive unit)

    Concern: Customer states: There is a clunk noise coming from under vehicle that occurs

    when accelerating from a stop, and when regenerative braking starts. Please inspect and

    advise.

    Corrections: Rear Motor General Diagnosis

    Confirmed rear axles make clicking noise when moving from reverse to forward

    acceleration from stop.

    Corrections: Halfshafts - Lubricate at Hubs LH/RH

    Removed rear axles from hubs to access, clean and lubricate rear axle splines. Confirmed

    no further noise upon completion.
     
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