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| Yet another my clutch wont disengage thread (Page 3/3) |
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zkhennings
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MAY 22, 09:43 AM
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If you are able to fit a deep socket in there it just seems like the rod coming out of the slave is too short, the piston in the slave may not be anywhere near its furthest retracted position and therefore is missing a bunch of available travel as it is starting at mid stroke and hitting the snap ring at the end of the bore after only 3/4" of travel. Seems to be the case as you are able to fit that deep socket in there, the piston is moving farther into the slave with the extra length of the socket, and the pedal is returning to full height because the MASTER cylinder's bore is actually filling fully with fluid as the SLAVE now retracts fully when you release the pedal due to the extra length. I think your solution will be to modify the rod coming out of the slave permanently at this longer length.
Is there a chance there is already an Isuzu slave installed and the rod installed is the shorter one for a Getrag? I have an Isuzu slave and trans but a Spec 2+ clutch (same pressure plate and clutch for all the Fiero trans, just different TOB) and my pedal is super heavy due to the smaller slave bore and high performance clutch, but I only have to push it in like halfway to disengage the clutch, which I like for faster shifting. The Getrag slave has a larger bore and there less movement with the same master to reduce pedal effort (pounds / square inch * cylinder area in2 = pounds of force at clutch fork)
I would verify that there is nothing obviously cracked in the clutch arm on the outside of the trans, and that it is not at some weird angle (it is on a splined shaft and could have been be rotated by a PO) and if so put a longer slave rod on there and call it a day until something changes/breaks.[This message has been edited by zkhennings (edited 05-22-2023).]
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Patrick
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MAY 22, 05:22 PM
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| quote | Originally posted by zkhennings:
If you are able to fit a deep socket in there it just seems like the rod coming out of the slave is too short...
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My suspicion as well.  When Shem didn't respond to that specific question, I figured he must've measured the slave push rod and it was the correct length, but...[This message has been edited by Patrick (edited 05-22-2023).]
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shemdogg
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MAY 22, 08:46 PM
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Thought it was a bent fork because theres no way that trans arm the slave rod pushes will move that far. New master went bad so im using the abominator master. I put a wood dowel to hold the clutch to the floor, then try to wedge the fork arm back further to see if it will. Takes a lot of force just to wedge something between them and common sense says that arm moves back anymore, somethings gonna break. The deep socket is not replacing the slave rod, it is installed OVER the slave rod so the ratchet end is facing the fork arm thingie. Really it extends the slave rod by maybe 3/16" but its enuf to let the trans shift. Def a getrag slave.
I have a big ol 6' level I can push the clutch in while watching the slave rod move. The instant the pedal starts to move, the slave moves in unison till about 3/4 of the way, then pedal travel goes to a 2:1 till the very end it just moves maybe another 1/8" with the last bit of pedal. So its not a proportional move the entire way, probably because its starting to hit the pressure plate.
Eff it, its done it works. Gonna drive it, drove it a bit today. Picking up izuzu slave tomorrow if more clutch issues resurface. Me thinks the brand new flywheel is too fat, and the clutch disc has some extra meat on the bone causing the issues. Ive had new brake pads be too thick to fit into the caliper, thinkin same kinda issue.
shem
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zkhennings
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MAY 22, 09:46 PM
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Right but can you push the slave rod back into the slave at all? That's really what I was saying. I believe the piston is starting mid stroke. The deep socket may be putting it close to or all the way into its bore. [This message has been edited by zkhennings (edited 05-22-2023).]
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shemdogg
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MAY 23, 09:12 AM
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No the slave rod is bottomed out as the last part of the bleeding(with the bleeder completely removed), its definitely starting from as far back as it can go.
shem
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zkhennings
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MAY 23, 11:57 AM
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But was it that way prior to putting the deep socket in there? I just have a strong feeling that the issue was just that your slave rod was undersized which is why adding the socket fixed it. But I am just a dude behind a keyboard and you are actually wrenching on the car so I will shut up 
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shemdogg
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MAY 23, 11:46 PM
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Yeah it was before I put the socket on. Did it 3 times to be safe lol. I was all outta options and pretty friggin frustrated at that point so I tried the socket. It works n im walkin away from messing w it.......... lol
shem
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