1999 corolla left front vibration after braking.

There seems to be a vibration from the left front after braking. I
replaced the caliper thinking it was getting stuck. It drove fine for
a day or so but the vibration has returned. It doesn't last as long
and it use to. There is no vibration during braking indicating that my
rotor is still ok (I believe). I don't have abs. Any thoughts??

Thanks
-Nick

<nick.a33@gmail.com> wrote in message
news:1128723480.162471.76360@g44g2000cwa.googlegroups.com...[color=blue]
> There seems to be a vibration from the left front after braking. I
> replaced the caliper thinking it was getting stuck. It drove fine for
> a day or so but the vibration has returned. It doesn't last as long
> and it use to. There is no vibration during braking indicating that my
> rotor is still ok (I believe). I don't have abs. Any thoughts??
>
> Thanks
> -Nick
>[/color]
How long does the vibration last after you release the brake pedal?
--
Ray O
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Vibration lasts less then one to two minutes.

"Nick" <nick.a33@gmail.com> wrote in message
news:1128725655.073359.266520@g44g2000cwa.googlegroups.com...[color=blue]
> Vibration lasts less then one to two minutes.
>[/color]

So after you apply the brakes, a vibration occurs that lasts about a minute
or two? Does it matter if the car is stopped or moving? What speed? When
was the last time someone did work under the hood?

If you hold steady pressure on the brake pedal, does it slowly drop to the
floor?

I had assumed that you were in the U.S. but just in case, does the car have
a diesel or gas engine?

I think you said that you did not have ABS. Is this correct? (by the way,
it helps if you do not cut out relevant information when responding to the
post).

--
Ray O
correct the return address punctuation to reply

Hi Ray O,

I really appreciate the your effort. I'm sorry about the lack of info
in the post but this is my first time posting and I welcome any
questions. To answer your followup questions, the vibration sound is
only heard when the car is moving and braking. For example stoping at
a stop sign and moving again. It is not there after the car comes to a
complete stop from braking, only when I start moving again. The sound
seems to go away as I accelerate past 20 mph. No one has worked under
the hood except for oil change. The brake pedal does not slowly drop
to the floor when I hold steady presure. I am in the US and it is a
gas engine. I do not have abs. As I said, I replaced the caliper with
a remanufactured one but it didn't fix the issue. The rotor looks good
on visual inspection and I don't have any vibration during braking.
Brake pads are brand new too. It is not a grinding sound but strictly
vibration and seems to project to the frame under the door. Any input
would be most appreciated cause I can't figure it out!

Thanks
-Nick


Ray O wrote:[color=blue]
> "Nick" <nick.a33@gmail.com> wrote in message
> news:1128725655.073359.266520@g44g2000cwa.googlegroups.com...[color=green]
> > Vibration lasts less then one to two minutes.
> >[/color]
>
> So after you apply the brakes, a vibration occurs that lasts about a minute
> or two? Does it matter if the car is stopped or moving? What speed? When
> was the last time someone did work under the hood?
>
> If you hold steady pressure on the brake pedal, does it slowly drop to the
> floor?
>
> I had assumed that you were in the U.S. but just in case, does the car have
> a diesel or gas engine?
>
> I think you said that you did not have ABS. Is this correct? (by the way,
> it helps if you do not cut out relevant information when responding to the
> post).
>
> --
> Ray O
> correct the return address punctuation to reply[/color]

"Nick" <nick.a33@gmail.com> wrote in message
news:1128974733.167988.217420@g47g2000cwa.googlegroups.com...[color=blue]
> Hi Ray O,
>
> I really appreciate the your effort. I'm sorry about the lack of info
> in the post but this is my first time posting and I welcome any
> questions. To answer your followup questions, the vibration sound is
> only heard when the car is moving and braking. For example stoping at
> a stop sign and moving again. It is not there after the car comes to a
> complete stop from braking, only when I start moving again. The sound
> seems to go away as I accelerate past 20 mph.[/color]

Nick, no offense intended, but your descriptions are terrible. You say
that the vibration sound is only heard when the car is moving and braking
but below, you said that you do not have any vibration when braking.

Does the sound occur when you are braking at low speeds?

Does the sound occur even if you do not have the brake pedal depressed?

Does the sound occur if you are accelerating up to about 20 MPH?

Does the sound change if you are turning?

No one has worked under[color=blue]
> the hood except for oil change. The brake pedal does not slowly drop
> to the floor when I hold steady presure. I am in the US and it is a
> gas engine. I do not have abs. As I said, I replaced the caliper with
> a remanufactured one but it didn't fix the issue. The rotor looks good
> on visual inspection and I don't have any vibration during braking.
> Brake pads are brand new too. It is not a grinding sound but strictly
> vibration and seems to project to the frame under the door. Any input
> would be most appreciated cause I can't figure it out!
>
> Thanks
> -Nick[/color]

Did you measure rotor run-out when you replaced the caliper?

Did you bleed the brake system after replacing the caliper?

Did you torque the wheel lug nuts evenly in a star pattern?
--
Ray O
correct the return address punctuation to reply

[color=blue]
> Ray O wrote:[color=green]
>> "Nick" <nick.a33@gmail.com> wrote in message
>> news:1128725655.073359.266520@g44g2000cwa.googlegroups.com...[color=darkred]
>> > Vibration lasts less then one to two minutes.
>> >[/color]
>>
>> So after you apply the brakes, a vibration occurs that lasts about a
>> minute
>> or two? Does it matter if the car is stopped or moving? What speed?
>> When
>> was the last time someone did work under the hood?
>>
>> If you hold steady pressure on the brake pedal, does it slowly drop to
>> the
>> floor?
>>
>> I had assumed that you were in the U.S. but just in case, does the car
>> have
>> a diesel or gas engine?
>>
>> I think you said that you did not have ABS. Is this correct? (by the
>> way,
>> it helps if you do not cut out relevant information when responding to
>> the
>> post).
>>
>> --
>> Ray O
>> correct the return address punctuation to reply[/color]
>[/color]

The brake system was bleed and the wheel lug nuts were torqued in a
start pattern. I did not measure the rotor run-out.

"Nick" <nick.a33@gmail.com> wrote in message
news:1129043019.568813.244210@f14g2000cwb.googlegroups.com...[color=blue]
> The brake system was bleed and the wheel lug nuts were torqued in a
> start pattern. I did not measure the rotor run-out.
>[/color]

Nick,

I'm getting old and I respond to quite a few posts. You will get much
better responses if you make sure the original post and previous responses
are still visible when you post follow-ups.

You still have not provided enough information for anyone to give you
anything more than a wild guess so I'll post some questions again.

At what speed does the vibration occur?
Does the vibration occur when applying the brake pedal?
Does the vibration occur when applying the accelerator pedal or when
coasting?
Who did the brake work?
How many miles (kilometers) are on the car now?
Did whoever performed the brake work inspect the inboard side of the rotors?
Did whoever performed the brake work inspect the rubber brake lines?
Does the vibration occur only when going in a straight line?
Does the vibration occur only when turning? If so, turning which way?

We'll come back to rotor runout after you answer these questions.
--
Ray O
correct the return address punctuation to reply