Acceleration shudder fix

[vraev]

I just received the updated FIX (part # 77-C) on my car. The rattle is completely gone. However, I noticed an issue:

Set the car to HIGH suspension
Accelerate by pressing down on the pedal

Do you notice a "vibration/clanking".

This is gone at standard setting.

Those of you who had the fix added can you please try this and check if you face the same sound?

Here is what I was able to record:

 

[vraev]

Hi
I had my struts replaced with the 77-C and the rsttle has gone however I now get a rumble under hard acceleration. SC say it is either drive shafts or DU but seems strange it never did it before.

Please see my above video. Is this the same sound?

 

[TMeister]

Set the car to HIGH suspension
Accelerate by pressing down on the pedal

So, why would you do this other than to stress the components with a full power acceleration? The car cancels the HIGH setting at 45 mph anyway. The time you need this feature is when you are going over speed bumps not when you are driving on a smooth highway.

Read the section about launching the car in the manual. Air suspension on low. It's in the ludicrous section of the acceleration modes chapter but good advice even without it. The reason is to get the half shafts more in line with the wheel. Minimizes stress on the CV joints that way. The noise you are hearing is well documented in the forums and replacing the half shafts cures it. But you are still not supposed to do the acceleration test on the HIGH setting.

 

[TMeister]

BTW, my -77-C strut replacement has cured the rattle noise for now. Only 200 miles since the work so we will have to see.

 

[MarkJ]

Please see my above video. Is this the same sound?

Yes, that's the same sound I now get with suspension on standard setting under hard acceleration after the air struts were swapped out for the modded ones.

 

[MarkJ]

So, why would you do this other than to stress the components with a full power acceleration? The car cancels the HIGH setting at 45 mph anyway. The time you need this feature is when you are going over speed bumps not when you are driving on a smooth highway.

Read the section about launching the car in the manual. Air suspension on low. It's in the ludicrous section of the acceleration modes chapter but good advice even without it. The reason is to get the half shafts more in line with the wheel. Minimizes stress on the CV joints that way. The noise you are hearing is well documented in the forums and replacing the half shafts cures it. But you are still not supposed to do the acceleration test on the HIGH setting.

Do you have any idea why mine now makes this noise on standard setting?

 

[Newkiebrown]

Is this “strut” part the same issue as the dreaded shudder issue with the Half Shafts?

 

[UncaNed]

Would a March 2018 Model X have the improved parts?

And if it does shudder and I keep driving it, will it ultimately fail?

Sometimes I hear something funny and I'm not sure if I have jack shaft shudder or not.

 

[SpudLime]

The Longest-Range Electric Vehicle Now Goes Even Farther

Constant Refinement
To complement these changes, we’ve also re-engineered several other components of Model S and Model X in keeping with our philosophy of continuous improvement. These updates include new wheel bearings and a few new tire designs for certain variants to improve range, ride, and steering. While these changes may seem minor, together they have a meaningful impact when it comes to EV design.

 

[Mike Robinson]

I just received the updated FIX (part # 77-C) on my car. The rattle is completely gone. However, I noticed an issue:

Set the car to HIGH suspension
Accelerate by pressing down on the pedal

Do you notice a "vibration/clanking".

This is gone at standard setting.

Those of you who had the fix added can you please try this and check if you face the same sound?

Here is what I was able to record:

My SC told me I will always get that shutter/clanging if the suspension is set higher than standard. He recommended low setting for full throttle from stop.

 

[vraev]

That is what I got from the service centre as well. They say that the suspension by default is made to run "low" that anything higher can cause this sound. For now, it has been nearly 5-8K Km since I got the new 77C struts installed and so far, it seems good. Definitely worth it as a tradeoff. I also recently got them to replace the right sway bar and the suspension rattle is all but gone. I didn't bother checking if this shudder is persistent after the sway bar replacement.

 

[Mike Robinson]

That is what I got from the service centre as well. They say that the suspension by default is made to run "low" that anything higher can cause this sound. For now, it has been nearly 5-8K Km since I got the new 77C struts installed and so far, it seems good. Definitely worth it as a tradeoff. I also recently got them to replace the right sway bar and the suspension rattle is all but gone. I didn't bother checking if this shudder is persistent after the sway bar replacement.

Yeah, one SC told me that replacing those struts (axles?) would NOT resolve the problem, but a different SC told me it likely would, so they replaced them at no charge and I have not had the issue since then.

They also told me that I should keep the car in standard suspension height as much as possible to get the best tire wear.

 

[Wratran]

Can someone post a repair invoice for pre raven cost?

My cost was $2000 for 18 Model X