Brakes dont feel right!

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rugster

New Member

Aug 31, 2004

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May 6, 2007

#1

• May 6, 2007

• #1

I have a shimmy upon braking and its been there for a while. I replaced the front rotors and pads and its still there. It definitely feels like its coming from the front of the car and it feels like it is rotational...meaning as I come to a stop at a light it feels like the caliper is only grabbing on section of the rotor and the braking isn't even all the way around the rotor....I recently lowered the car 2 inches and put on caster camber plates and I'm wondering if this will go away after I have it aligned, or if this problem could be something else....any help would be greatly appreciated

Also when i replaced the front brakes the drivers side front pad was worn way down while the passenger side was nearly untouched...maybe this is the culprit?

 

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FalconGuy016

New Member

Oct 26, 2004

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Northern VA

May 6, 2007

#2

• May 6, 2007

• #2

By shimmy do you mean it's like, sort of, a pulsing feel? It definitely rotational for me and I can feel it even right before I come to a complete stop sometimes. Because if so that crap has been happening to me for 20,000 miles and I'd really like to know how to fix this.

 

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WillDuhhBeast

New Member

Jun 25, 2005

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Jacksonville Florida

May 6, 2007

#3

• May 6, 2007

• #3

Have you guys tried bleeding your systems, or replacing your brake fluid? They Haynes describes how to do it the exact way.

 

Skud

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Sep 10, 2003

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Saskatchewan

May 6, 2007

#4

• May 6, 2007

• #4

Maybe you have too much runout in one of your front hubs? The best way to check is to take off your wheel, and use a dial indicator on the rotor.

Spin the rotor and watch to see how much the dial indicator moves. I think the runout should be less than 10 thousandths.

If you have too much runout, then the rotor will contact your pads harder in some spots than others. This will cause a feeling similar to a warped rotor..

Riley

 

4point6

New Member

Feb 8, 2004

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Twin Cities, MN

May 7, 2007

#5

• May 7, 2007

• #5

Did you change the rears too? I thought mine felt like they were the fronts too, but ended up being warped rears. Just a thought

 

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rugster

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Aug 31, 2004

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May 7, 2007

#6

• May 7, 2007

• #6

no i didnt change the rears....reason being that I was on the highway wondering if maybe it was the rears...so i pulled the e-brake and there was no such vibration...so I dont think it was the rears

 

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rugster

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Aug 31, 2004

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May 7, 2007

#7

• May 7, 2007

• #7

oh and i have a bigger problem to worry about now....I have the dreaded piston slap and Im putting in a new motor this weekend....at least it's a PI motor

 

merc123

Active Member

Jan 27, 2003

420

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North GA

May 7, 2007

#8

• May 7, 2007

• #8

I don't think you'll feel a vibration by pulling the e-brake up like that.

 

GDawg

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Mar 22, 2002

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Nevada

May 7, 2007

#9

• May 7, 2007

• #9

I remember a couple times really getting on the brakes. Afterwards I started to feel a very noticeable "pulse" in my brakes when braking. I took my car to a reliable brake shop to get my rotors "turned". They told me my rotors weren't that bad but I had them do it anyway. It helped.

Are Mustang stock rotors that sensitive?

I want some Bullitt brakes.

 

merc123

Active Member

Jan 27, 2003

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North GA

May 8, 2007

#10

• May 8, 2007

• #10

Is this an automatic or manual?

 

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rugster

New Member

Aug 31, 2004

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May 8, 2007

#11

• May 8, 2007

• #11

manual

 

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FalconGuy016

New Member

Oct 26, 2004

437

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Northern VA

May 8, 2007

#12

• May 8, 2007

• #12

Maybe I should just get a cobra brake conversion sigh

 

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rugster

New Member

Aug 31, 2004

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May 8, 2007

#13

• May 8, 2007

• #13

wish i could do that, but I bought a new engine today so I think I have had enough for this week..

 

StangYellow

Founding Member

Sep 11, 2002

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May 8, 2007

#14

• May 8, 2007

• #14

You lowered the car... which means your brake lines came off. If your brakes arent bled, they end up feeling a little soft... maybe they are grabbing the brakes.... and then going soft? Sounds more like an issue with the pads and calipers. If you have a pulse it means your rotors are warped.

 

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rugster

New Member

Aug 31, 2004

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May 8, 2007

#15

• May 8, 2007

• #15

i lowered the car yes, but i never had to take off the brake calipers so i shouldnt need to bleed the lines...im gona replace the rears and hopefully the problem will go away.

 

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FalconGuy016

New Member

Oct 26, 2004

437

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Northern VA

May 8, 2007

#16

• May 8, 2007

• #16

Great. Sounds like I have warped rotors then.

 

02gtat54

New Member

Apr 29, 2006

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Concord,N.C.

May 8, 2007

#17

• May 8, 2007

• #17

Did you lube the bolts that mount the calipers?It sounds like the caliper may be frozen and not moving properly on the side with no wear to the when th pistons try to push on the pads.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,243

17,924

224

Massachusetts

May 8, 2007

#18

• May 8, 2007

• #18

rugster said:

Also when i replaced the front brakes the drivers side front pad was worn way down while the passenger side was nearly untouched...maybe this is the culprit?

Click to expand...

That happens when the slide pins in the caliper sieze and do not move. The caliper basically only presses on one side. It would cause the issues you are having.

You will need to pull the caliper, free up the pins, clean then and relube.

Also, a good bleed couldn't hurt either