Sudden clutch pedal vibration and rattle noise?

[Andydote]

Morning all.

Just been to the shops and as I was waiting at a junction, clutch down, there was a sudden rattle/knocking sound and heavy vibration in the pedal.

I still was able to pull off normally and the noise stopped. A few mins later it happened again.

Any ideas?

[Mike Noc]

Hate to say it Andy but thrust release bearing? It is built into the slave cylinder. :getmecoat:

[Andydote]

:(:(:(:(:(

[andy willi]

dmf on its way out dose it rattle on tickover with clutch up


andy

[VMax1000]

Doesn't the release bearing noise normally disappear when you press the pedal as the bearing at that point presses firmly against the diaphram springs?

Release bearing normally rattles in neutral with foot off the clutch.

Wouldn't rule it out but it might be some diaphram spring fingers are damaged

[Andydote]

I'll explain exactly what happened:

All was fine, until I was waiting at a junction with my foot down on the clutch and first gear selected. Suddenly, in this exact position, there was a loud vibrating/rattle noise and I could feel it in the clutch peddle. I lifted the peddle and pulled off as normal. The rattle stopped once the clutch was lifted.

Then about 5 minutes later, same position of 1st gear selected and clutch down, it happened again. Once clutch was lifted it stopped.

The rest of the journey home (3 miles) the clutch engaged fine, but the car did seem to lag a little, although the clutch bite was normal..

[VMax1000]

Makes me wonder if the pressure plate (diaphram) lost some spring fingers...