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

gg_got_a_tesla

Model S: VIN 65513, Model 3: VIN 1913
Jan 29, 2010
6,534
788
Redwood Shores, CA
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.

Is anyone else experiencing a vibration not unlike the old 4 mph D shake when they use autosteer at low (35 mph ish) speeds? I get it almost every time. It's nasty. (Might also be at highway speeds too but I haven't tried that yet.)

I've sense that too in the steering wheel only though, when holding it while autosteer is engaged. I never got the 4mph D shake so I don't know what that was like, but turning off autosteer gets rid of the vibration. I wonder if that's expected in some situations?

I have the same issue!! I can actually hear the vibration, it's not as loud as the lane departure warning but audible. I did notice that the sound goes away whenever the wheel is turning (ie. not straight)

This, this! When I had Autosteer going with TACC set to 70 on the freeway, but, was actually doing 35-40 with traffic being slow, there was a loud drone from the front motor and significant vibration through the steering wheel!

Mistook it for the AC compressor first and turned HVAC off but, that only made the noise even more noticeable. Once the speed got up to 70 and also, after I turned Autopilot off, there was no more noise.

It was loud and unpleasant. It only appears to come on with Autopilot on at low speeds.
 

gg_got_a_tesla

Model S: VIN 65513, Model 3: VIN 1913
Jan 29, 2010
6,534
788
Redwood Shores, CA
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
 

jdw

Member
Supporting Member
Jun 1, 2015
713
1,486
Vancouver
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.
 

gg_got_a_tesla

Model S: VIN 65513, Model 3: VIN 1913
Jan 29, 2010
6,534
788
Redwood Shores, CA
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.

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?!
 

jdw

Member
Supporting Member
Jun 1, 2015
713
1,486
Vancouver
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.
 

jdw

Member
Supporting Member
Jun 1, 2015
713
1,486
Vancouver
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.
 

gg_got_a_tesla

Model S: VIN 65513, Model 3: VIN 1913
Jan 29, 2010
6,534
788
Redwood Shores, CA
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.
 

jdw

Member
Supporting Member
Jun 1, 2015
713
1,486
Vancouver
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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