Grinding / Shaking under emergency braking - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Kurenai · 10-31-2012, 01:26 PM

So on Sunday, I was nearly hit by someone who just randomly decided to merge into my lane, but I wasn't hit due to judicious application of the brakes. However during said braking, the pedal starting severely shaking and I hear what I can only describe as grinding.

Under normal braking, I have never heard anything like this (~6300 miles). I was able to replicate this today buy accelerating to ~20mph in a parking lot then immediately applying the brakes hard.

Is this the ABS/booster system kicking in.. or something else?

7thgear · 10-31-2012, 01:29 PM

this is how ABS feels like

working as intended

Kurenai · 10-31-2012, 01:37 PM

Quote:

Originally Posted by 7thgear

this is how ABS feels like

working as intended

I'm hoping that's true, but the ABS on my MR2-Spyder wasn't nearly this aggressive/loud.

7thgear · 10-31-2012, 01:54 PM

Quote:

Originally Posted by Kurenai

I'm hoping that's true,

okay you got me, i lied, you have a catastrophic defect in your car, you should go to a Ford dealer immediately to have this looked at.

Guff · 10-31-2012, 02:13 PM

Sounds like ABS to me.

jstn · 10-31-2012, 02:25 PM

Just ABS getting rowdy. Some cars aren't as violent about it as this one.

jadewbj · 10-31-2012, 02:26 PM

This sure sounds like ABS.

canu_50 · 10-31-2012, 02:58 PM

problem solver? take out abs fuse

mhigham · 10-31-2012, 04:36 PM

Quote:

Originally Posted by Kurenai

So on Sunday, I was nearly hit by someone who just randomly decided to merge into my lane, but I wasn't hit due to judicious application of the brakes. However during said braking, the pedal starting severely shaking and I hear what I can only describe as grinding.

Under normal braking, I have never heard anything like this (~6300 miles). I was able to replicate this today buy accelerating to ~20mph in a parking lot then immediately applying the brakes hard.

Is this the ABS/booster system kicking in.. or something else?

ABS, sounds normal. Likely had some stability control, ABS based, also being applied. These systems pump very fast now compared to older systems for better control and less locking of the brakes. I havent had mine come on yet except for stability control, and its loud.

[ame="http://www.youtube.com/watch?v=dj7WIlliwgQ"]Subaru BRZ drift secrets, stability control, VSC and TRC settings - YouTube[/ame] good video and you can hear the system going nuts.

Mike

wheelhaus · 10-31-2012, 05:26 PM

Definitely sounds like ABS. The ABS pump makes a grinding sound as it cycles on and off dozens of times per second. I've driven many cars with ABS, some were smoother, but you can still hear and feel the ABS when it was active, especially under you foot.

Spartan65 · 10-31-2012, 05:32 PM

In reference to shaking , is anyone experiencing shaking when turning off their car?

7thgear · 10-31-2012, 05:39 PM

Quote:

Originally Posted by Spartan65

In reference to shaking , is anyone experiencing shaking when turning off their car?

yes, this is normal in vehicles with moving components like an engine, transmission and other pieces with mass that move around.

FWD drivers may tend to experience this less than awd/rwd cars.

wheelhaus · 11-01-2012, 11:32 AM

Quote:

Originally Posted by Spartan65

In reference to shaking , is anyone experiencing shaking when turning off their car?

Yes it's normal. When the engine is running it vibrates, at all RPM, but when it slows below idle the vibes become much lower frequency and more pronounced. The engine shakes a lot more because it can't balance itself well. Same thing happens when you start the engine.

rick · 11-01-2012, 11:47 AM

ABS

10-31-2012, 01:26 PM	#1
Kurenai Member Join Date: May 2012 Drives: 2013 Scion FR-S Hot Lava 6AT Location: United States Posts: 53 Thanks: 1 Thanked 14 Times in 10 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Grinding / Shaking under emergency braking So on Sunday, I was nearly hit by someone who just randomly decided to merge into my lane, but I wasn't hit due to judicious application of the brakes. However during said braking, the pedal starting severely shaking and I hear what I can only describe as grinding. Under normal braking, I have never heard anything like this (~6300 miles). I was able to replicate this today buy accelerating to ~20mph in a parking lot then immediately applying the brakes hard. Is this the ABS/booster system kicking in.. or something else?

10-31-2012, 01:29 PM	#2
7thgear i'm sorry, what? Join Date: Jan 2012 Drives: Canada Location: I rock a beat harder than you can beat it with rocks Posts: 4,399 Thanks: 357 Thanked 2,508 Times in 1,268 Posts Mentioned: 40 Post(s) Tagged: 3 Thread(s)	this is how ABS feels like working as intended __________________ don't you think if I was wrong, I'd know it?

11-01-2012, 11:47 AM	#14
rick Member Join Date: Jul 2012 Drives: 86 Location: Dubai Posts: 68 Thanks: 34 Thanked 18 Times in 13 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	ABS __________________

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Bad Emergency Jack?	JDMenrique	Issues \| Warranty \| Recalls / TSB	35	11-27-2015 08:55 PM
notchy/gritty transmission. every gear grinding	prest1ge	Engine, Exhaust, Transmission	41	12-09-2012 07:45 PM
Severe Shaking while in Idle from 0-5 mph	ScionFR-S	Engine, Exhaust, Transmission	1	10-15-2012 10:42 PM
Slight grinding from the brakes...	kndonlee	Other Vehicles & General Automotive Discussions	7	09-15-2012 06:14 PM
Manual grinding sound	deedz	Engine, Exhaust, Transmission	22	07-20-2012 11:05 PM

10-31-2012, 02:25 PM	#6
jstn Senior Member Join Date: Jul 2012 Drives: '15 Vortech Supercharged Location: United States Posts: 105 Thanks: 7 Thanked 34 Times in 19 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Just ABS getting rowdy. Some cars aren't as violent about it as this one.

10-31-2012, 02:58 PM	#8
canu_50 Senior Member Join Date: Aug 2012 Drives: Scion fr-s Location: Terrebonne Posts: 239 Thanks: 115 Thanked 59 Times in 47 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	problem solver? take out abs fuse

10-31-2012, 05:26 PM	#10
wheelhaus Join Date: Jul 2012 Drives: 2013 BRZ, 2020 KTM Super Duke 1290R Location: Denver Posts: 1,788 Thanks: 714 Thanked 1,141 Times in 624 Posts Mentioned: 49 Post(s) Tagged: 1 Thread(s)	Definitely sounds like ABS. The ABS pump makes a grinding sound as it cycles on and off dozens of times per second. I've driven many cars with ABS, some were smoother, but you can still hear and feel the ABS when it was active, especially under you foot.

User Name		Remember Me?
Password