FAQ: Vibration under braking: warped rotors? NO!

[D.J.]

but maybe the auto hold function in the MY23 prevents this ?

What would the auto hold have to do with this?

Is the auto hold system different in 2023?

 

[SanDiegoBlue]

I don't know of any difference with MY23. I'm thinking it may use the parking brake and thus the fronts are not in contact ?? (if it's just applying the regular brakes -- then would be no change). I think there was a thread bout this a few months ago... I have not gone back and read this (was not important to me at the time).

 

[D.J.]

I don't know of any difference with MY23. I'm thinking it may use the parking brake and thus the fronts are not in contact ?? (if it's just applying the regular brakes -- then would be no change). I think there was a thread bout this a few months ago... I have not gone back and read this (was not important to me at the time).

The auto hold function definitely does not use the parking brake, ever.

The auto hold function uses the regular hydraulic brakes, all four corners.

See item #8 in the attached.

 

[SanDiegoBlue]

Good to know. Then no difference to brake deposits when stopped. I don't use autohold, just does not feel natural to me.

 

[Snicklefritz]

Good to know. Then no difference to brake deposits when stopped. I don't use autohold, just does not feel natural to me.

What, hovering over the go pedal so you can hit it doesn't seem natural? Inconceivable.

 

[RogueIV]

What, hovering over the go pedal so you can hit it doesn't seem natural? Inconceivable.

The way auto hold comes off the brakes when you hit the gas doesn't feel great. I only use it when im at a drive thru or something similar.

 

[Snicklefritz]

The way auto hold comes off the brakes when you hit the gas doesn't feel great. I only use it when im at a drive thru or something similar.

Could you describe "doesn't feel great"?

I've been using auto hold since the beginning. It's one of my favorite features. The way I use it to do fast accelerations is, initial press releases the brakes and then a smooth press to the floor or close to it. I never jam on the throttle.

 

[D.J.]

Could you describe "doesn't feel great"?

I've been using auto hold since the beginning. It's one of my favorite features. The way I use it to do fast accelerations is, initial press releases the brakes and then a smooth press to the floor or close to it. I never jam on the throttle.

I love auto hold so much, I have my car defaulting to "on" for auto hold each time I start the car.

I never leave home without it.

 

[Snicklefritz]

I love auto hold so much, I have my car defaulting to "on" for auto hold each time I start the car.

I never leave home without it.

If you managed that, did you also default to ISG OFF automatically when you start?

 

[D.J.]

If you managed that, did you also default to ISG OFF automatically when you start?

Of course, same video shows both happening at the exact same time.

I set it to 15 seconds after starting.,

https://imgur.com/a/RltYt8v

 

[AlphaNav]

Wanted to add to this discussion here as im looking at future options for a desirable track pad, as well as drop my brake setup after testing!

Had a first real test of my brake setup the other day at Buttonwillow CW13, first time on track.

Brake setup is currently: CounterSpaceGarage CP pads on Girodisc 2 pc rotors front and rear. The CSG CP pads are street oriented but can handle light track duty (has a really high operating temperature to really get them warmed up, spoke a lot with some of their drivers).

Total of 5 sessions, ran into ZERO issues on track, eventually warmed up to putting a lot more braking force on corners like sunset and sunrise as well as the off-ramp corner, not a single issue. Every demand I made, the brake setup obliged and I had so much confidence in it. Also produced minimal dust, which is crazy, picture is before the last session of the day (4 sessions deep).

 

[Thomby]

What, hovering over the go pedal so you can hit it doesn't seem natural? Inconceivable.

I never used Auto Hold in my first year of ownership, but started trying it out after finding out it applies the Parking Brake at shutdown (meaning you can simply shut the engine off vs. my usual Park, Parking Brake, Engine Off sequence).

Nothing odd for me pulling away from red lights or drive-thrus, but the need to hit the gas out of parking spots or my garage, instead of just easing partway off the brake, is a bit unnatural. Release brake fully, tap gas, jump back to brake.

 

[D.J.]

I never used Auto Hold in my first year of ownership, but started trying it out after finding out it applies the Parking Brake at shutdown (meaning you can simply shut the engine off vs. my usual Park, Parking Brake, Engine Off sequence).

Nothing odd for me pulling away from red lights or drive-thrus, but the need to hit the gas out of parking spots or my garage, instead of just easing partway off the brake, is a bit unnatural. Release brake fully, tap gas, jump back to brake.

This is the way

I know exactly what you mean about releasing the brake, tap the gas, to release the auto hold, and then gently back on the brake to ease out of a downhill driveway. I've been doing exactly this since 2018.

 

[Snicklefritz]

I never used Auto Hold in my first year of ownership, but started trying it out after finding out it applies the Parking Brake at shutdown (meaning you can simply shut the engine off vs. my usual Park, Parking Brake, Engine Off sequence).

Nothing odd for me pulling away from red lights or drive-thrus, but the need to hit the gas out of parking spots or my garage, instead of just easing partway off the brake, is a bit unnatural. Release brake fully, tap gas, jump back to brake.

I have never kept auto hold on till I shut down. Always turn auto hold off just before parking because of what you just said. I dislike the feeling of having to tap the gas pedal to disengage auto hold when finishing parking. So, you are saying that if I leave auto hold on when I finish parking and and put the trans into "P" that auto hold then automatically engages the parking brake and I don't have to? I do not have a GT2 and have to manually put the trans into "P".

 

[Thomby]

So, you are saying that if I leave auto hold on when I finish parking and and put the trans into "P" that auto hold then automatically engages the parking brake and I don't have to? I do not have a GT2 and have to manually put the trans into "P".

In the GT2, if you shut the car off, it will shift to Park but not engage the Parking Brake. If you have Auto Hold, it will additionally engage the Parking Brake.

For the non-E-Shifter, I would assume Auto Hold will follow the same logic (engage Parking Brake), but I haven't thought through the logic of AH applying the brake, and maybe it's for a scenario that doesn't apply to Base/GT1 models.

For example, if there's an Auto Hold scenario where you could inadvertently shut the car off in Neutral instead of Park, you'd have the Parking Brake as backup. But the only scenario I can imagine where it can't go into Park rolling in gear at too great a speed (so it either refuses to engage or shears off the parking pawl), which seems at least as likely without AH engaged. Actually, I don't even know if the car will turn off if you're rolling in gear or neutral...

I guess it could also be a carryover from non-GT2s, where you could shut the car off in AH and never engage Park, but I still don't see how that's different from just shutting off with your foot on the brake in Drive/Reverse.

 

[Snicklefritz]

In the GT2, if you shut the car off, it will shift to Park but not engage the Parking Brake. If you have Auto Hold, it will additionally engage the Parking Brake.

For the non-E-Shifter, I would assume Auto Hold will follow the same logic

My GT1 does engage the parking brake if I stay in auto hold, shift to "P" and turn off. I just now tried it and had never noticed that before.

 

[Navaids]

Never heard. Does that do what I think it does? twist the Philips with each smack of the hammer?

Yep! Works great.

 

[Navaids]

I read this, while literally laughing out loud!

View attachment 87725

I think the Robertson square drive is superior but less common in the lower 48.