TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC

Strange regen braking problem - shaking

Discussion in 'Model S' started by teslick2, Nov 2, 2019.

  1. teslick2

    teslick2 Member

    Joined:
    Sep 1, 2019
    Messages:
    21
    Location:
    Virgina
    Hi all,

    Now that the weather is colder I have noticed some strange shaking with the regen breaking on my 2013 model s. On cold mornings when I start driving it will start to shake pretty hard at low reg braking speeds (no feet on either pedals). The moment I press the brakes it stops. It appears to only happen on downhills and tends to go away once I’ve been driving a while.

    Has anyone ever experienced this or can they share any thoughts or advice? Since it only happens under specific conditions it’s hard to demonstrate to the service center and they have not been able to help.

    thanks!
     
  2. steve841

    steve841 Active Member

    Joined:
    Jan 17, 2010
    Messages:
    1,841
    Location:
    Ft. Lauderdale, FL
    Total guess .... motor mount
     
  3. teslick2

    teslick2 Member

    Joined:
    Sep 1, 2019
    Messages:
    21
    Location:
    Virgina
    Good point. Does the motor engage during reg braking?
     
  4. bishoppeak

    bishoppeak Member

    Joined:
    Oct 3, 2015
    Messages:
    444
    Location:
    San Luis Obispo, CA
    That's what does the regen
     
  5. teslick2

    teslick2 Member

    Joined:
    Sep 1, 2019
    Messages:
    21
    Location:
    Virgina
    So thinking about this more, if it were the motor mount, then wouldn’t it exhibit the same behavior when accelerating?
     
  6. steve841

    steve841 Active Member

    Joined:
    Jan 17, 2010
    Messages:
    1,841
    Location:
    Ft. Lauderdale, FL
    Forces are going in the opposite direction ....
     
  7. Benjanos

    Benjanos Member

    Joined:
    Jul 20, 2018
    Messages:
    194
    Location:
    Switzerland
    Strange it goes away after driving a while. Wonder if once the battery is warm and the regen becomes stronger the problem is less apparent for some reason.

    Did you recently change to winter wheels/tires? Wheel/tires can create strange problems sometimes if not setup right. Just a thought.
     
  8. teslick2

    teslick2 Member

    Joined:
    Sep 1, 2019
    Messages:
    21
    Location:
    Virgina
    update: the problem went away when I got the tires changed. The old ones were pretty beat, and the metal bands were showing in some places. That being said, I think it was a combo of things happening that were causing the shakes. I found that it only occurred when doing regen braking, on a downhill, while the air suspension was lowering. Add bad tires to the mix and things got weird.
     
  9. JDWalker

    JDWalker New Member

    Joined:
    Feb 7, 2020
    Messages:
    1
    Location:
    San Francisco
    I started to have shaking going down only very steep hills, which also stops when I break. It shakes an alarming amount. It’s didn’t do this for the first few weeks, but now does it consistently in one steep hill by my house. I made a service appointment.
     
  10. teslick2

    teslick2 Member

    Joined:
    Sep 1, 2019
    Messages:
    21
    Location:
    Virgina
    Keep me posted on the results! Mine still does it a little, but it’s much less common now.
     
  11. Battpower

    Battpower Supporting Member

    Joined:
    Oct 10, 2019
    Messages:
    1,560
    Location:
    Uk
    Shaking on heavy (or moderate) acceleration or deceleration loads on warn drive shaft couplings / CV joints can cause odd vibration. Especially CV joints change with temperature, spread of grease and random alignment of internal components.

    If you have air suspension, changing the ride height can give some diagnostic clues.
     

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


    SUPPORT TMC