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VR SS manual weird vibration

silent

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So i got a vr ss 5ltr manual

mods are headers , and 3inch exhaust

i have a weird vibration that rattles the entire car throughout the rev range more prominent at around 3000rpm i have changed the engine mounts and the harmonic balancer seems to be in good condition

If you hold the rpm at 3000 and slowly push the clutch in and out the vibrations change

im thinking sipgot bearning? input shaft?

Any help would be great its doing my head in....
 

BlackVXGTS

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When you say the vibration is more prominent at 3000rpm, is that in all gears or only in top gear? Have you checked the universal joints?
 

pendles

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definitely would check the tailshaft, Centre bearing and gearbox mounts.
spigot bearing you would only hear a grumble noise when clutch is engaged.
input shafts bearing would make a fairly loud grumble at idle not just at 3000 rpm
 

pendles

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could also be a collapsed thrust bearing or on its way out. rule out the drive line first (tailshaft etc) then you can narrow it down a lot better
 

silent

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Yeah its not the tail shaft it will do it in nuetrual aswell

what is the thrust bearning (kinda new to this)
 

pendles

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im leaning towards thrust bearing.
its the bearing that is attached to the clutch fork and depresses against the clutch diaphragm.
it takes all the load, so they dont last forever
 

silent

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So had the problem fixed was the spigot bearing afterall its such a relief to drive a smooth car now not something a chick uses when he partner is away :p
 
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