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Will the halfshaft issue be fixed?

Discussion in 'Cybertruck: Driving Dynamics' started by Dazureus, Dec 16, 2019.

  1. Dazureus

    Dazureus Member

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    Almost anyone that has the dynamic air suspension in the Model X and Model S is familiar with the issues of prematurely worn halfshafts in the front suspension (aka acceleration shudder). I've had the halfshafts on my Model X replaced three times (all under warranty) with the latest fix being keeping the suspension in low at all times. It's suspected that the angle of the joint at ride heights greater than that a low is contributing to the wear.
    With the Cybertruck's reported adjustable suspension, I'm wondering a few things:
    1) Is this going to be a completely redesigned suspension, free from the S/X issues?
    2) If it's an iterative design from S/X, how will this issue be addressed?

    Also, with such a great variance in ride height, is there a mechanism to reduce uneven tire wear when riding at the various heights for long periods?
     
  2. ryan.fenchel

    ryan.fenchel New Member

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    Excellent questions. We have 2018 MX with shudder and I just scheduled service to replace (first time) half-shafts. It is my wife’s car but when I get it I hammer it on occasion (who am I lying too...every time.

    Reserved a tri-motor Cybertruck for me. Will be bummed if it suffers similar issues.
     
  3. Hank42

    Hank42 Member

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    Are you referring to AWD models S/X? my 2012 RWD S has no such shudder/shaft problems - so I'm assuming this is an AWD issue?
     
  4. Dazureus

    Dazureus Member

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    It's probably a combination of the linkages required for adjustable suspension with the torque output from the front motor. Here's a link to the 44 page thread in the Model X forum. Users are starting to report it on Raven models as well. I've had my halfshafts replaced a few times and during the latest repair, techs suggested that I keep the suspension in low to mitigate the issue.
     
    • Informative x 1
  5. OneLapper

    OneLapper Member

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    If Tesla gets the front end of the Cybertruck geometry correct, and it has no front end / ball joint / CV joint / half-shaft issues, then they have done something that Ford, Chevy/GMC, and Dodge/Ram hasn't been able to do.

    Of all the trucks I've owned, only the 2wd versions have over 80k without a front end repair or rebuild.
     
    • Informative x 1
  6. Atari2600

    Atari2600 Member

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    How many miles do the front half shafts last on a S or X with an air suspension?
     
  7. dpodoll

    dpodoll Member

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    No
     
    • Helpful x 1
  8. drcarric2650

    drcarric2650 Member

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    Question, and forgive my ignorance, but would a quad motor correct this half shaft problem?
     
  9. Darmie

    Darmie Supporting Member

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  10. Cyber_Dav

    Cyber_Dav Member

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    I understand it to be an articulation issue. If that is the case, no, number of drive motors would not affect this issue.

    Unless perhaps they put the motors themselves on gimbals so the half shafts did not articulate at all. I have no idea if this is possible or feasible. :)
     
  11. drcarric2650

    drcarric2650 Member

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    Thanks!
     
  12. ricohman

    ricohman Member

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    Why not use portal hubs?
     
  13. Xenoilphobe

    Xenoilphobe Active Member

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    Fixed
    [​IMG]
     
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