Shaking clutch pedal until pedal is pushed - Mustang Evolution

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Old 04-25-2015, 10:58 PM   #1
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Shaking clutch pedal until pedal is pushed

Just put new clutch, throwout bearing, pilot bearing, pressure plate in and now pedal vibrates until you put any pressure on the pedal and then is smooth and normal? I do have about an inch of dead travel in the pedal now also

Stock cable, exedy mach 400 clutch, ford racing pilot and throwout bearing

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Old 04-25-2015, 11:05 PM   #2
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Also when rpms climb the pedal vibrates faster. Not a bad vibration but can feel it in the pedal


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Old 04-26-2015, 12:00 AM   #3
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Mine does this! Just replaced what you did as well!

I would really like to know why it does this as well! It bothers the heck out of me.


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Old 04-26-2015, 12:04 AM   #4
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Mine does this! Just replaced what you did as well!

I would really like to know why it does this as well! It bothers the heck out of me.


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Have you adjusted your cable all?


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Old 04-26-2015, 12:22 AM   #5
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Shaking clutch pedal until pedal is pushed

Ok so took the dust cover off to look while the car was running and the clutch fork seemed like it was jumping around a lot. When pedal has pressure, it stops vibrating though.
Doesn't make sense. It never did that before the new clutch. Does it just need adjusted?


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Old 04-26-2015, 11:15 AM   #6
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Shaking clutch pedal until pedal is pushed

So to adjust the stock cable you pull up on the clutch and you should hear a "zip line snap" and it should self adjust.

I did that and nothing happens... I got about an inch of dead travel


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Old 04-26-2015, 12:04 PM   #7
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Yea its adjusted. Im not so sure on it being from that tho.

If soccer sees this im sure he can state a few causes


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Old 04-26-2015, 12:27 PM   #8
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First of all, I recommend driving your cars as little as possible until you guys get this problem solved.

There are several things that can cause this but hopefully it is just that you guys don't have the TOB preload adjusted correctly.
Try pushing the clutch pedal all of the way to the floor, and then slowly release it, and then pull up FIRMLY. It should make a clicking noise. Then slowly press the pedal to the floorboards again.
If the factory quadrant is no longer able to properly adjust the clutch, you are going to have to get an aftermarket piece.
Scotty is the resident expert on this subject so hopefully he will see this and get you guys squared away.
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Old 04-26-2015, 12:48 PM   #9
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First of all, I recommend driving your cars as little as possible until you guys get this problem solved.

There are several things that can cause this but hopefully it is just that you guys don't have the TOB preload adjusted correctly.
Try pushing the clutch pedal all of the way to the floor, and then slowly release it, and then pull up FIRMLY. It should make a clicking noise. Then slowly press the pedal to the floorboards again.
If the factory quadrant is no longer able to properly adjust the clutch, you are going to have to get an aftermarket piece.
Scotty is the resident expert on this subject so hopefully he will see this and get you guys squared away.

I did what you said about adjusting it and it's not doing anything


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Old 04-26-2015, 12:55 PM   #10
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Yeah. The one in my car doesn't seem to do anything either.
You will probably have to get an aftermarket quadrant and a firewall adjuster.
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Old 04-26-2015, 01:02 PM   #11
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Could slack in the cable be why it is vibrating? Once you push he pedal past the slack point the vibration in the pedal stops


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Old 04-26-2015, 01:09 PM   #12
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Yes it can!
When adjusted properly, the TOB should be just barely touching the fingers on the pressure plate.
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Old 04-26-2015, 01:39 PM   #13
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Yes it can!

When adjusted properly, the TOB should be just barely touching the fingers on the pressure plate.

My dad got under the car and looked through the dust cover with a mirror and he thought that a couple of the fingers on the pressure plate were always touching the tob. And when I pressed on the clutch, the rest of the fingers would touch and stop the vibrating.

But I do have an inch of slack that I didn't have until after the new clutch was put in


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Old 04-26-2015, 01:48 PM   #14
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What brand throw out bearing did you install?


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Old 04-26-2015, 01:55 PM   #15
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All of the fingers should be level and all of them should be in slight contact with the throw out bearing.

What brand is the pressure plate?
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Old 04-26-2015, 02:00 PM   #16
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Originally Posted by straybullitt View Post
All of the fingers should be level and all of them should be in slight contact with the throw out bearing.



What brand is the pressure plate?

Exedy pressure plate and mach 400 clutch, ford racing throwout and pilot bearing. I took a couple good videos but idk how to post them on here or if you can


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Old 04-26-2015, 02:05 PM   #17
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Hmmm.
Could any of the fingers have gotten bent during the transmission install?

You have to post the video on YouTube and then post a link on here.
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Old 04-26-2015, 02:10 PM   #18
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Shaking clutch pedal until pedal is pushed

Video through the dust cover. Some of the fingers on the pressure plate touching the throwout bearing before the others. Thinking this is what's causing the vibration in the pedal. What do you think? This is pushing he clutch pedal through it's slack point

http://youtu.be/EqGP0O_Zppk

May have to open video in safari to see it.

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Old 04-26-2015, 02:15 PM   #19
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The video is private.

That will cause the vibration!
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Old 04-26-2015, 02:19 PM   #20
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http://youtu.be/EqGP0O_Zppk

How about now?


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Old 04-26-2015, 02:30 PM   #21
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That worked.
I can see that one finger that sticks up.
They should all be at the same height.
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Old 04-26-2015, 02:38 PM   #22
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This is a McLeod but the fingers should look like this.

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Old 04-26-2015, 02:42 PM   #23
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Shaking clutch pedal until pedal is pushed

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Originally Posted by straybullitt View Post
This is a McLeod but the fingers should look like this.

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Yeah I guess I should've payed closer attention to that before I put it in, but it's too late for that now. Going to have to take ****ing thing apart again for a new pressure plate.... Fml.... I am beyond pissed right now


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Old 04-26-2015, 08:05 PM   #24
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I'm looking for just the mach 400 pressure plate with no clutch and I can't find it anywhere any ideas?


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Old 04-26-2015, 11:29 PM   #25
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This company may have them.
http://www.rpmware.com/catalog/group/50512

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Old 04-26-2015, 11:42 PM   #26
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This company may have them.
http://www.rpmware.com/catalog/group/50512

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Thanks for the research. It looks like you have to be ordering trough a company to register on their website


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Old 04-26-2015, 11:46 PM   #27
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I just Googled "Exedy Pressure Plate repair".
There must be a source for just the PP.
Maybe Exedy themselves...
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Old 04-27-2015, 12:07 AM   #28
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Originally Posted by straybullitt View Post
I just Googled "Exedy Pressure Plate repair".

There must be a source for just the PP.

Maybe Exedy themselves...

Yeah I'm gonna ca them in the morning and see what they can do. May end up just having to buy another kit and have them reimburse me


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Old 04-27-2015, 05:19 PM   #29
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Shaking clutch pedal until pedal is pushed

Got transmission dropped again but from looking at the pressure plate I can't see that the fingers are bent. But in that video I took, your looks pretty obvious some fingers are always hitting the throwout bearingClick image for larger version

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Old 04-27-2015, 05:38 PM   #30
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It might be an optical illusion but all of the fingers look off center to me.
Did you torque the PP down correctly?
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Old 04-27-2015, 05:50 PM   #31
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Originally Posted by straybullitt View Post
It might be an optical illusion but all of the fingers look off center to me.

Did you torque the PP down correctly?

Yes I can't remember exactly what I torqued to, I think 55 ftlb rings a bell. And I think I torqued flywheel to 80-85


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Old 04-27-2015, 05:55 PM   #32
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And in a diagonal pattern I presume.

Am I correct that the pressure plate fingers looks off center? Or did the clutch disc move?

And what the hell were we looking at in that video?
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Old 04-27-2015, 06:21 PM   #33
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Originally Posted by straybullitt View Post
And in a diagonal pattern I presume.



Am I correct that the pressure plate fingers looks off center? Or did the clutch disc move?



And what the hell were we looking at in that video?

I think it just looks that way from the angle. Everything bolted in fine anyway. And the video was looking through the dust cover at the throwout bearing and the pressure plate


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Old 04-27-2015, 06:28 PM   #34
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Yes. But what was that finger that was circled?
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Old 04-27-2015, 06:39 PM   #35
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Yes. But what was that finger that was circled?

That is the finger that looked like it was always impacting the throwout bearing before the others were. I'm thinking that is why the pedal would sit there and vibrate when the clutch wasn't depressed and would stop and be smooth when the rest of the fingers hit the tob when you depressed the clutch a little bit


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