Car shutter when braking.

[BadCat]

Yall experience a bit of shutter when braking hard at all?

Didn't know if yall had the issue?

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[zrk]

You mean the engine decel, or like a suspension like shake?

The engine definitely aggressively downshifts, which is almost a "shutter"

 

[BadCat]

You mean the engine decel, or like a suspension like shake?

The engine definitely aggressively downshifts, which is almost a "shutter"

Definitely braking. Not on the decel. And not all the time. Almost like auto braking system is pulsating a tiny bit.

 

[obito]

I haven’t had this issue but is your front collision thing braking for you? I turned that off

 

[SpeedRacer]

Have you tracked your car, are you aggressive on the brakes, do you live in a hilly area?

Could be warped rotors. It would feel like a pulsation through the brake pedal and sometimes through the steering wheel. I haven’t run into that with the Supra but it’s been an issue for us with several other cars (we live in the Texas Hill Country and it’s hard on brakes). A good shop can diagnose it quickly.

 

[BadCat]

I haven’t had this issue but is your front collision thing braking for you? I turned that off

No its only when I press the brake

 

[BadCat]

Have you tracked your car, are you aggressive on the brakes, do you live in a hilly area?

Could be warped rotors. It would feel like a pulsation through the brake pedal and sometimes through the steering wheel. I haven’t run into that with the Supra but it’s been an issue for us with several other cars (we live in the Texas Hill Country and it’s hard on brakes). A good shop can diagnose it quickly.

This is likely the issues now that I think about it. I'll check the rotors. Car only has 3k ont it....

 

[BadCat]

Following up on the actual issue. Took the car to Toyota, turns out lower a arm bolts were loose... caused the rattling and shaking when braking. Toyota said they weren't charging me for tightening them up as if they had done me a true solid...

Lived to drive another day.

 

[MYNEWFAST]

Following up on the actual issue. Took the car to Toyota, turns out lower a arm bolts were loose... caused the rattling and shaking when braking. Toyota said they weren't charging me for tightening them up as if they had done me a true solid...

Lived to drive another day.

Good that it's been sorted.
I was going to say that warped rotors normally only pulsate the brake pedal.

 

[SpeedRacer]

Following up on the actual issue. Took the car to Toyota, turns out lower a arm bolts were loose... caused the rattling and shaking when braking. Toyota said they weren't charging me for tightening them up as if they had done me a true solid...

Lived to drive another day.

How do those come loose?! Did you mod the suspension?

If I was Toyota and suspension bolts were loose on an unmodified car, I’d tighten them with locktite and go back to look for other examples of that occurring.

 

[Mark5]

Same thing happened to my car the past couple of weeks... Can feel mild/moderate vibration on brake pedal and chassis like moderately slowing down from 50mph through 30mph.

I just completed a road test with the tech and he felt it and says it's probably warped rotors. They are looking into it more for me, however I have 21k miles on my car with 50% brake pad life left, so if actually been very careful with the car and it's never been tracked. Hope they cover it as a factory defect.

Now that I think about it, this was when the weather became extremely cold, then I drove to Florida in the middle of it for the holiday and it was 70° there. So it was basically 10° or less to 70°. Idk if That had something to do with it.

 

[Deighvid]

I came here wondering if someone discovered ABS ?

 

[FLtrackdays]

I had the same exact thing on hard deceleration, about 145 to 70mph

It’s fixed now

 

[FLtrackdays]

But yeah, she was shuddering a bit before it happened. You could definitely feel it coming…. End result, new tight bolts & it doesn’t do it anymore, lol. Great post @BadCat! I wish I would have saw your post prior to this happening. Will definitely check mine for now on!!

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