Plaid Vibration around 38-42MPH....

[terranx]

But just the 80 mph vibration right? And the lower speed one I haven't seen track pack fix that but moving power to the rear makes it vanish. Clearly two different problems.

This guy says the 38-42 one went away - Plaid Vibration around 38-42MPH....

 

[sorka]

This guy says the 38-42 one went away - Plaid Vibration around 38-42MPH....

In his case then, there's no way that switching to RWD would have made any difference if changing out the brakes is what made it go away.

 

[terranx]

In his case then, there's no way that switching to RWD would have made any difference if changing out the brakes is what made it go away.

I don’t think that can be definitively stated

 

[sorka]

I don’t think that can be definitively stated

If it's caused by very slight warped rotors then how how would switching to RWD make it go away?

Although if it was slightly out of round wheels, then it might make a difference powering on the rear wheels... hmmm.

 

[terranx]

If it's caused by very slight warped rotors then how how would switching to RWD make it go away?

Although if it was slightly out of round wheels, then it might make a difference powering on the rear wheels... hmmm.

Because the floating rotors would theoretically soak up any minor imbalance. Say the front motor is has some weird gear back lash or something causing okay, floating rots may mask that.

Not saying it’s definitively the issue. Maybe it’s just a reduced rotating mass thing. But I don’t know for sure to make any statement confidently.

 

[WilliamG]

This guy says the 38-42 one went away - Plaid Vibration around 38-42MPH....

He’s only mentioning the first drive 38-42. Btw the first drive vibration is not 38-42 anyway. It’s low 30s for me. So I don’t really understand that.

 

[terranx]

mine is all speeds. Just goes away quickly

 

[RussZTT]

Did you mean the vibration between 35mph-42mph or over 80mph on the highway?

35moh-45mph

 

[RussZTT]

Nobody has ever proven that it’s axle geometry, by the way. it has already been established that if you set the power to the rear vibration is completely gone. I think the issue is with the front motor and resonance at different frequencies. Now, the angle of the front motor seems to play a part because lowering the car does make a difference, but that is not the root cause of the issue as far as anyone has been able to tell.

I'm probably speaking of my racing thoughts as I set my pinion angle myself on my race car. To me that makes total sense to me when lowering a vehicle. Either way, lowering it worked perfectly.

 

[RussZTT]

He’s only mentioning the first drive 38-42. Btw the first drive vibration is not 38-42 anyway. It’s low 30s for me. So I don’t really understand that.

Ya that's strange, I never had an issue below those speeds. It was for sure annoying.

 

[Leftlane22]

My 22 Plaid has the same slight vibration you can feel in the steering wheel and the pedals from 35-45, can feel it more when the car is cold. Seems to get better as everything warms up. Nothing at any other speeds.

 

[RussZTT]

My 22 Plaid has the same slight vibration you can feel in the steering wheel and the pedals from 35-45, can feel it more when the car is cold. Seems to get better as everything warms up. Nothing at any other speeds.

If you like the look, lower it.

 

[n2mb_racing]

My 22 Plaid has the same slight vibration you can feel in the steering wheel and the pedals from 35-45, can feel it more when the car is cold. Seems to get better as everything warms up. Nothing at any other speeds.

I'm curious if the warmup vibration will go away if you switch to the new KAF1 recommended gearbox fluid. Maybe ask Tesla to do that?

 

[sorka]

mine is all speeds. Just goes away quickly

Same with mine on both msp and mxp. Lasts the same amount of time and then vanishes instantly after a minute even with latest firmware. Doesn't seem like an actual problem. Feels like abs calibration I've felt on other cars.

 

[RussZTT]

Not that it happens on "hard" acceleration but normal driving.

 

[Leftlane22]

Honestly it hasn’t bothered me too much, and I’m very susceptible to thinking that I have every problem I read about on any car forum. In the grand scheme of things this is super minor and I’m grinning like an idiot every time I drive my car.

 

[sorka]

Not that it happens on "hard" acceleration but normal driving.

This is the classic shudder on acceleration issue. My P85D went through 4 sets of half shafts before I got smart and lowered the car 1" (the original 2014 factory height before they raised the car 1" to mitigate battery strikes).

 

[Dameon]

If you like the look, lower it.

I'm either going to lower or spacers. Very thin spacers on my P90D made a huge difference in looks. I'm uncertain of spares on the Plaid though. There HAS to be a tremendous amount of torque in the hubs and the spacer would have to mega strong. The spacers I had on the P90D didn't give me a lot of confidence.

Are you lowered on factory 21" wheels/tires? Do they rub at all?

 

[NeuroRad]

I had a 5mm spacer on the rear of my plaid and they cracked. Poor quality. Threw them in the trash.

 

[RussZTT]

I'm either going to lower or spacers. Very thin spacers on my P90D made a huge difference in looks. I'm uncertain of spares on the Plaid though. There HAS to be a tremendous amount of torque in the hubs and the spacer would have to mega strong. The spacers I had on the P90D didn't give me a lot of confidence.

Are you lowered on factory 21" wheels/tires? Do they rub at all?

Nope, didn't rub at all. You will need an alignment after because it will move your toe out. I went to the auto store and get the Dorman 965-013D washers, used 2 on each bolt. If you do this, let me know and I can provide help on how. I figured out a way to get it done in about 30 min and that includes taking and installing the wheels. It was super easy. As matter of fact, I had installed another washer with it but it caused my aftermarket wheels to stick out a bit with the aggressive offset and I took a washer out. Took no time at all.