Jebinc’s Plaid Vibration Experiment Results!!!

[xEvoLveDx]

Well, if the CV joints have stretched and have slightly more play, under light load they could vibrate from alternating between loaded and unloaded. Under heavy load, the torque from the front motor might keep the slack in the joints pinned tightly, preventing the vibration.

If that were true, then it might indicate that a software fix is possible. The solution would be to put a little more torque on the front motor under light load, to keep the CV joints from vibrating.

Well, now, come to think of it... We could test that using track mode. Hmm. Just adjust bias between front and back motors and see if the vibration goes away. I'll have to try that later today.

I thought the front motors were still on full tilt unless you are turning in track mode, even with the bias fully to the rear

 

[n2mb_racing]

I thought the front motors were still on full tilt unless you are turning in track mode, even with the bias fully to the rear

I don't know. Let's find out!

 

[MarcG]

Don’t forget Track Mode drops the suspension to low even at slow speeds

 

[lbowroom]

Don’t forget Track Mode drops the suspension to low even at slow speeds

I see no reason to not drive on low all the time.... even an inch lower than low.

 

[jebinc]

I’m due to receive my Model S in 2 weeks.
This is B.S. this problem has existed for 5 or more years. My Raven X has it. Not buying another Tesla until they fix it.

@mswlogo Best cancel your MS order then as this won't be fixed by Tesla any time soon - especially since they are now calling it "normal"...

 

[jebinc]

Well, if the CV joints have stretched and have slightly more play, under light load they could vibrate from alternating between loaded and unloaded. Under heavy load, the torque from the front motor might keep the slack in the joints pinned tightly, preventing the vibration.

If that were true, then it might indicate that a software fix is possible. The solution would be to put a little more torque on the front motor under light load, to keep the CV joints from vibrating.

Well, now, come to think of it... We could test that using track mode. Hmm. Just adjust bias between front and back motors and see if the vibration goes away. I'll have to try that later today.

I think the track mode bias settings are in effect only when powering out of a corner, not straight line driving.

 

[lbowroom]

@mswlogo Best cancel your MS order then as this won't be fixed by Tesla any time soon - especially since they are now calling it "normal"...

Its a different suspension and different problem than 5 years ago... jeb, thought you were vibration free with a .7" drop. Is that not the case?

 

[jebinc]

Its a different suspension and different problem than 5 years ago... jeb, thought you were vibration free with a .7" drop. Is that not the case?

@lbowroom It is the case, but @mswlogo said links are a bandaid, one they are not interested in. Without the bandaid, one can count on developing the vibration if they are not careful, re height settings and hard acceleration.

More testing still needed on mine and I still need a volunteer to replicate my experiment.

 

[lbowroom]

@lbowroom It is the case, but @mswlogo said links are a bandaid, one they are not interested in. Without the bandaid, one can count on developing the vibration if they are not careful, re height settings and hard acceleration.

More testing still needed on mine and I still need a volunteer to replicate my experiment.

So if Tesla lowered the default ride height in software which is completely feasible, there's no bandaid.

 

[jebinc]

So if Tesla lowered the default ride height in software which is completely feasible, there's no bandaid.

@lbowroom See OP

 

[lbowroom]

@lbowroom See OP

Seems we agree. So why continue the story that the same problem has existed for years and there's no hope for fixing it?

 

[jebinc]

Seems we agree. So why continue the story that the same problem has existed for years and there's no hope for fixing it?

@lbowroom It’s not the same story. I do feel Tesla will not address the refreshed MS version of the vibration any time soon, if ever, as they call it “normal”.

 

[lbowroom]

I think it's important for people to understand that the previous driveline problem was addressed in the refresh. Unfortunately there seems to be a new problem. If it's simply lash in the CV joint that causes vibration when unloaded and a 1/2"-3/4" drop in the suspension mitigates it, then it's a minor problem.

 

[n2mb_racing]

I just ordered the lowering links and I'll try lowering my car 0.5" to see if it makes a difference.

 

[jebinc]

I just ordered the lowering links and I'll try lowering my car 0.5" to see if it makes a difference.

Are you stepping up to be a volunteer to repeat this experiment? We need to confirm or refute the findings!

 

[jebinc]

Data collection poll!

Refreshed Model S and Plaid Vibration demographics

Your input is needed for a ongoing vibration experiment discussed here. https://teslamotorsclub.com/tmc/posts/6455160/

teslamotorsclub.com

 

[n2mb_racing]

Are you stepping up to be a volunteer to repeat this experiment? We need to confirm or refute the findings!

Yup!

 

[mswlogo]

So if Tesla lowered the default ride height in software which is completely feasible, there's no bandaid.

Same band-aide they did do on my Model X. But ruined 8 tires prematurely by wrong camber.

 

[n2mb_racing]

Same band-aide they did do on my Model X. But ruined 8 tires prematurely by wrong camber.

Did you get an alignment after installing the lowering links? I mean, it's annoying to have to pay to fix a brand new car, but I'm happy to just have a fix and move on with my life.

 

[lbowroom]

I just ordered the lowering links and I'll try lowering my car 0.5" to see if it makes a difference.

Huh, with your username I assumed you’d be up for dropping it more