Knocking sound....from clutch assembly?

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turbo87targa

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I just recently noticed my car has a random knocking sound after it's fully warm and has been driven a bit, but it varies in noise level, and sometimes sounds like it isn't there at all, but pressing in the clutch always makes it go away and letting the pedal back out is like 50/50 it'll go away or come back.

Is this, along with the various clicks and clacks I've been hearing 6 puck chatter? I started noticing this after my 500 mile break in on my 6 puck.
 
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turbo87targa

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sounds pretty much just like that.I had thought it was my throw out bearing also but the sound is practically silent when the car is first turned on.
And it's not always the same, if I step in the clutch it goes away, but when I let it out it can either be gone, quieter, or the same, and that's what confuses me the most.

No slippage tho, clutch grabs hard.

Are those comments about 6 pucks true? A $500 clutch every 5-7k miles sounds like bs to me.
 
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IJ.

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Failure14;1532943 said:
6 pucks do chatter, but its kinda hard to understand what sound your hearing.
I searched on youtube and found this, is this what your hearing?

http://www.youtube.com/watch?v=b_Vc7IXfdSg
Click to expand...
Exact opposite of what T87T is describing......

turbo87targa;1533073 said:
sounds pretty much just like that.I had thought it was my throw out bearing also but the sound is practically silent when the car is first turned on.
And it's not always the same, if I step in the clutch it goes away, but when I let it out it can either be gone, quieter, or the same, and that's what confuses me the most.

No slippage tho, clutch grabs hard.

Are those comments about 6 pucks true? A $500 clutch every 5-7k miles sounds like bs to me.
Click to expand...
My "guess" at this point is the snout on the Mainshaft in the gearbox has/is failed/failing.

A vid of the noise would help.
 
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IJ.

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That's the LOUDEST I've ever heard it but it sounds like what I described earlier.

The snout on the mainshaft is hardened it's not very deep and in 20 years it wears through, this makes the grumble when idling in neutral with the clutch out as the mainshaft sags against the cluster shaft, push the clutch in and the cluster slows then stops and the noise goes away.
 
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turbo87targa

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im also missing the upper inspection plate (got lost in a sea of garage parts...still searching) so that kinda amplifies the sound.

how should i go about fixing it? do i need a whole new gearbox or is the snout replaceable?
 
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IJ.

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Don't pound on it and it should keep going for a long time, puck clutch probably hasn't helped it any as the tend to engage hard.

Maybe dump the thickest gear oil in it you can find to quiet it down some...
 
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turbo87targa

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Speaking of gear oil, I changed whatever the PO had along with the clutch and put in royal purple gear oil, maybe that's another reason I'm hearing it so much, I heard a few ppl here had weird tranny sounds with RP gear oil....redline time

thank you for the help btw.
 
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turbo87targa

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So I got time yesterday to change my tranny fluid from the RP that was in there to the redline mt90, the knock got even louder? My guess is the RP was thicker? Should this have been expected or did something else possibly break?
 
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