Archived New clutch with vibration/noise in the clutch pedal when shifting at 3K RPM

[Tuesdak]

I have a New Southbend 1947-OK-HD with flywheel put in by a shop about 1K miles ago. After break in I am revving the engine up to 3K and get a vibration in the pedal when depressing the clutch and a rattle noise I can hear while doing so. If I rev the engine in Neutral and push the clutch in at 3K RPM I also feel and hear it. I can hear the rattle/buzz noise in the back seat with someone else driving. New SB hydraulics were put in with the clutch.

It does not appear to do this at low RPM or idle.

Is this in any way normal?

SB Peter says to check the fork with the slave pulled out for vibration. Possible trans alignment issue (bad alignment pins/holes) Input shaft bearing loose, or throwout/clutch issue. Of course I am not happy about the 'pull the trans back out' possibility with all parties that would be involved.

In light of the past weird clutch failure linked below I am very concerned about a repeated failure over something that was missed.

https://www.turbodieselregister.com...ailure-And-South-bend-clutch-1947-OK-HD-notes

 

[SierraRam]

I can feel my throw out bearing slightly when depressing the pedal at higher RPM's, never really thought about it.

 

[Tuesdak]

Conclusion is the trans has to come back out and see why. Thread can be closed.

 

[Tuesdak]

As I hate threads that describe *your* symptom and NEVER have a solution...

Different good shop found a missing dowel pin. Of course this allows the transmission to move around. The pedal adjustment nut was also loose adding to the noise although that was fixed long ago.

 

[RVTRKN]

I believe that's twice in a short amount of time, that Peter from SBC was right again, it's good to know I have an SBC clutch. Don't know if you followed the thread were the owner wanted to go back to a DMF after conversion the SMF conversion and the Dealer Tech could not find the problem after numerous attempts to get it release the clutch.

https://www.turbodieselregister.com/threads/250603-2010-clutch-help-will-not-disengage

 

[South Bend Clutch]

Glad to hear the problem was found!! Thanks RVTRKN! Pretty much diagnosing these situations is a daily routine

Peter