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Steering Rack Replacement for Loud Noise from the front and Steering Wheel Vi...

Discussion in 'Model S: Driving Dynamics' started by gg_got_a_tesla, Oct 28, 2015.

  1. gg_got_a_tesla

    gg_got_a_tesla Model S: VIN P65513, Model 3 Res Holder

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    Steering Rack Replacement for Loud Noise from the front and Steering Wheel Vibration Only Under Autosteer

    Following up on the posts below from the Firmware 7.0 thread, when I took my late-Dec-2014 P85D for the LTE upgrade last week, I mentioned this to my service advisor at Tesla Burlingame and then took a technician for a ride-along this week to reproduce the issue.

    The service center folks hadn't heard of this issue before and opened a case with Engineering who've now recommended that the Steering Rack be replaced as that noise and steering wheel shudder shouldn't happen under Autosteer+TACC. It was so unpleasant that I was choosing not to use Autosteer if the real speeds were in that nasty band of about 25 mph to under the set TACC speed (of, 65-70 mph on the freeway).

    Burlingame is getting the Steering Rack from Fremont and my poor car's going in from some extensive work after the minor LTE upgrade work last week.

    Heads up to the posters below and others who may have experienced this.

     
  2. jdw

    jdw Member

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    Thank you! This has been driving me crazy ... it's like the lane departure warning is running full time at 25%.
     
  3. AmpedRealtor

    AmpedRealtor Active Member

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    More great QC from Tesla... not!
     
  4. brkaus

    brkaus Member

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    Probably an issue with testing it w/o the software available. One would hope there are test modes to test all the various motors, pumps, etc quickly. It appears not.
     
  5. gg_got_a_tesla

    gg_got_a_tesla Model S: VIN P65513, Model 3 Res Holder

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    Got the car back with the steering rack replaced. Works perfectly now; no more shudder and noise while on Autosteer at speeds lower than the set TACC speed. Great service from Tesla Burlingame!

    ImageUploadedByTapatalk1446565502.836675.jpg
     
  6. jdw

    jdw Member

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    I updated to 2.7.106 this morning and it seems to have fixed the vibration.

    Yesterday I was at the SC getting winter tires installed and mentioned this issue and thread. They seemed to feel that it was a firmware issue and advised patience until the next update ...so far they appear to be correct. The usual stop and go traffic that always triggered it did not today.
     
  7. gg_got_a_tesla

    gg_got_a_tesla Model S: VIN P65513, Model 3 Res Holder

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    Interesting. Thanks, jdw. They had 2.7.77 available when I took the car in but, that didn't address the issue.

    Weird though that the rack replacement fixed the issue for me, even with the older firmware.

    Maybe, the source of the problem was slightly different in our two cases?!
     
  8. jdw

    jdw Member

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    Quite likely, although the SC told me they felt that if the replacement rack was brand new from Fremont it may have already had the updated firmware. Who knows really ... I only have tonights trip home as a data point, but the same conditions that usually triggered it did not. Thanks a million for posting your story and the links to others with a similar problem!

    They also felt it might be a resonance problem, and that the new rack may have changed the "tuning" of the vibration.
     
  9. Trouthooked

    Trouthooked Member

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    Were you getting a vibration/humming in the steering column before auto-pilot? I have had an issue since the day I got the car. Now, with auto-pilot on...I get major vibration and the car sounds like an electric mower so something. Did replacing the rack fix your issue?
     
  10. jdw

    jdw Member

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    There is/was a little vibration from time to time which I believe was just feedback from the servo motor on the steering. That kind of feels like driving over slightly grooved pavement. The Autopilot shaking between 25-50MPH was a much more intense thing - you could see the wheel shaking, not to mention hear it. So far, 2.7.106 seems to have fixed at least most of it - at least I haven't had it happen in 3-4 days of driving that would have previously triggered it. I did not have my steering rack replaced, to be clear.
     
  11. Zextraterrestrial

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    hey at least the P85's are almost fully beta tested now :wink:
     
  12. gg_got_a_tesla

    gg_got_a_tesla Model S: VIN P65513, Model 3 Res Holder

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    After a few days of driving, I'm experiencing the noise again - at a much lower volume than before - and some vibration through the steering wheel (again, a lot less than before) in the speed band of 25 to 45 mph with TACC ON at 65-70 mph and Autosteer ON.

    So, the steering rack replacement helped but, there's something else at play that a firmware update may cure.

    Based on @jdw's experience, I've reached out to the SC to push 2.7.106 to my car to see if that helps.
     
  13. jdw

    jdw Member

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    I hope the firmware update does it for you! Day 5 and I haven't had any major vibration, but I am now attuned to an occasional slight vibration in the steering wheel, likely from the servo motor. Definitely not the major vibration and shaking I had, more like driving on slightly grooved pavement. Also not connected to Autopilot or any speed range as far as I can tell. I may just be overly sensitive to it now - that which has been seen cannot be unseen ...
     

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