C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Clutch question.

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Old Mar 18, 2009 | 08:53 PM
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Default Clutch question.

I put a spec clutch in my 1985 vette and when I put the new clutch in I got in the car and started pumping the clutch I pumped it about four times and then it made a loud pop noise. Now the clutch wont disengage. I can see the slave cylinder moving the shift fork but it isn't enough to disengage the clutch what is goin on?
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Old Mar 18, 2009 | 08:55 PM
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Also I checked the shift fork and it is on the throw out bearing like it should be. I know this because i looked through the hole in the bell housing that the shift fork is coming out of.
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Old Mar 19, 2009 | 01:12 AM
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I have to wonder about the clutch hydraulics... Could the pop have been a plunger in the master/slave?

Or could a spring in the pressure plate have snapped and hinder/block operation?
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Old Mar 19, 2009 | 07:21 AM
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Look inside again and see if the fork's is mated properly to the ball stud.
Been there, done that !!
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Old Mar 21, 2009 | 06:17 PM
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What is a ball stud?
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Old Mar 21, 2009 | 06:18 PM
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I got the clutch to work by using a longer rod. The one that pushes against the shift fork. The clutch works fine but it wants to slip a little bit like its not fully engaged. What is up with this?
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Old Mar 21, 2009 | 06:30 PM
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Originally Posted by ArmyBoyATC
What is a ball stud?
It's a stud with a ball shaped end. The fork pivots on the ball stud. There is a bowl shaped recess on fork where the ball stud is supposed to be positioned. If the fork slides off the ball, you will get some funky geometry, causing clutch problems.
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Old Mar 23, 2009 | 01:40 AM
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Can I replace the ball stud without pulling the trans or the motor?
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Old Mar 23, 2009 | 01:41 AM
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and can I see the ball stud without pulling the clutch or trans.
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Old Mar 23, 2009 | 07:53 AM
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You can't remove it with trans in, but you can see it. Pull the fork boot of bell and look inside. It might take a mirror and a flash light to get a good look to see if clip fingers on fork are positioned behind ball and that the ball is in the forks bowl shaped recess.
I was able to pull on fork to get it back into postion.
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Old Apr 5, 2009 | 07:18 PM
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Default Same Problem

Just wondering if yours is working correctly now. I replaced the clutch on my 85 4/3 this weekend and put it all together, but i am having a similar problem. The clutch appears to be working correctly - fork is positioned properly on the ball stud and around the throwout bearing - but I still can't shift into most gears and car remains in gear even with clutch fully deployed. I'm wondering if I need to adjust the shifter linkage?
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