Broken clutch fork caused an additional issue

IwantMKIII

IwantMKIII

WVU MAEngineering
Jun 12, 2007
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Perkasie, PA
Seems as though the broken clutch fork i encountered last week caused the vibarating issue. When it broke, only one side broke off which is why i was still able to engage 1st (barely). Later when trouble shooting the other side snapped as well identifying the problem.

I replaced the fork today only to find the vibration still exists. Everything appeared ok when i checked, no bent fingers, nothing out of place, etc.

Its also a very harsh/chattery engagement. Something is obviously causing a vibration through the fork to the clutch pedal...but what and why? Ideas?
 
Q

quake

toyota tech
Apr 13, 2005
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take a good lood at the parts involved, run the car on a lift if you can and look through the inspection hole, make sure the clutch is tight
 
IwantMKIII

IwantMKIII

WVU MAEngineering
Jun 12, 2007
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Perkasie, PA
I took a good look last time when i took out the broken fork. Had someone turn the crank a few times and saw nothing wrong. What I have noticed, not so surprisingly though is the vibration is RPM dependent so its something thats rotating and the vibration only occurs at the initial pressure point of the clutch (where is just starts to get hard). Once a decent amount of pressure is applied, the vibration ceases to exist.
 
gaboonviper85

gaboonviper85

Supramania Contributor
Jan 13, 2008
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If it's rpm dependent then it's either the pp or the flywheel....hate to say this Adam but the trans needs to come out....odds are that it wasn't the fork that caused this..this caused the fork to fail me thinks.

Buy your brothers mustang cause supras just don't likes you:-(
 
IwantMKIII

IwantMKIII

WVU MAEngineering
Jun 12, 2007
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gaboonviper85;1269314 said:
If it's rpm dependent then it's either the pp or the flywheel....hate to say this Adam but the trans needs to come out....odds are that it wasn't the fork that caused this..this caused the fork to fail me thinks.

Buy your brothers mustang cause supras just don't likes you:-(
Click to expand...


I thought about this. However, i can't help but notice when i began to loose the ability to shift really, the vibration didn't come until a bit later. I have a feeling the uneven pressure the fork applied to the throwout bearing, bent something or wore something unevenly in the short amount of time it failed. However its possible it was bent awhile and just finally gave that day, no one will know for sure.

As for the stang, they are not desperate enough for money yet as my sister put it...

EDIT: NO cars like me...you should know this by now...remember the blazer??? Not to mention to three nightmare of cars before that?
 
suprarx7nut

suprarx7nut

YotaMD.com author
Nov 10, 2006
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Dammit man, you have some shit luck. Every time I read a thread of yours its about some obscure part breaking, catching on fire, smoking, exploding or some other destructive means to an end...

One of these days a perfectly functional car will waltz its way into your life and make up for all these crazy problems...
 
gaboonviper85

gaboonviper85

Supramania Contributor
Jan 13, 2008
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IwantMKIII;1269363 said:
I thought about this. However, i can't help but notice when i began to loose the ability to shift really, the vibration didn't come until a bit later. I have a feeling the uneven pressure the fork applied to the throwout bearing, bent something or wore something unevenly in the short amount of time it failed. However its possible it was bent awhile and just finally gave that day, no one will know for sure.

As for the stang, they are not desperate enough for money yet as my sister put it...

EDIT: NO cars like me...you should know this by now...remember the blazer??? Not to mention to three nightmare of cars before that?
Click to expand...

the pilot shaft from the trans runs down the center of the throwout bearing so uneven pressure from the fork wouldnt effect the bearing at all as its a somewhat precision slip fit around the shaft of the trans...the pressure plate would never know the difference....

as far as the blazer goes....whatever happened to it? i dont remember you selling it like you wanted too.

so far the only thing i can think of is you got the clutch disk really hot and warped or cracked the friction material causeing it to chatter....i know you know the difference between chatter and vibration so im not gonna go there......but i do have a feeling that the flywheel bolts could be backing out...which "could" cause the flywheel to flutter so to speak...

the only way to really tell wtf is up is for you to drop the trans sad to say:-(
 
IwantMKIII

IwantMKIII

WVU MAEngineering
Jun 12, 2007
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Perkasie, PA
^ RPS 3200 Six puck sprung.


As i drive, i'm finding the problem to be correcting itself. Though this may not be wise depending on what it is, thats what's happening. I only drive a couple miles at a time, on my way to class and such, but even that little bit seems to be already showing signs of "improvement" (which could be a bad thing).
 
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