julians Posted September 18, 2001 Share Posted September 18, 2001 I've been driving my caterham everyday now for the past week (due to fiat being knackered), and I'm not sure whether I'm imagining it or whether its always been there, but I can hear a very soft muffled rumbling/very low pitched whine when I lift off the accelerator, it happens in any gear, and goes away when the clutch is pressed. The car has a sierra LSD I think, and a quaiffe sc box (although it doesent sound to be coming from the gearbox). It sounds like its coming from the diff/propshaft area, although it very hard to tell. Any suggestions?? Link to comment Share on other sites More sharing options...
oilyhands Posted September 18, 2001 Share Posted September 18, 2001 It's possible it could be the prop/diff, but these will remain turning regardless of the clutches position only the load will change since they will no longer be driven by the engine. Sounds to me like it could be the first motion shaft of the gearbox talking to you, when you declutch this slows right down id the gearbox is out of gear, or it could be some chit chat from the clutch release bearing. Oily Oily Link to comment Share on other sites More sharing options...
julians Posted September 18, 2001 Author Share Posted September 18, 2001 Any handy hints on how to identify where its coming from? Link to comment Share on other sites More sharing options...
CHRIS CLARK Posted September 18, 2001 Share Posted September 18, 2001 Does the noise exist when engine is running and car is stationary (in neutral) ? Depress the clutch pedal and the noise goes away? First motion shaft 'problem' (they all seem to do it !!!). Often misdiagnosed as a clutch release bearing fault. Link to comment Share on other sites More sharing options...
julians Posted September 18, 2001 Author Share Posted September 18, 2001 No its not that noise,it does make that noise but thats not the noise I'm reffering to. I guess I'll monitor it and see whether it gets worse Julian Link to comment Share on other sites More sharing options...
7cat7 Posted September 18, 2001 Share Posted September 18, 2001 The noisey Noise Mine makes a noise like a muffled rumbling. (my 7 and bike)... I went to the factory and someone there said it was NORMAIL:<...Did The Face work? Link to comment Share on other sites More sharing options...
7cat7 Posted September 18, 2001 Share Posted September 18, 2001 Drat it didnt............Help.........How do i make expreessions...U know what i mean... Link to comment Share on other sites More sharing options...
Blatman Posted September 18, 2001 Share Posted September 18, 2001 Check the faq herethumbsup.gif Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted September 18, 2001 Share Posted September 18, 2001 I think the noise you're referring to is he normal rumble of the diff. If so, they do all make that noise, but mine was getting more and more frequent and alot louder. The diff and propshaft have now gone off to be rebuilt. The thought of a propshaft failure or a diff seizing doesn't really appeal, although having said that, Steve Perks at SPC took a quick look at the parts and said they looked ok. I'll report back when he's rebuilt them. Alex Link to comment Share on other sites More sharing options...
The Pied Piper Posted September 21, 2001 Share Posted September 21, 2001 Julian, Yes, your car does use a Sierra Viscous LSD unit, I had to modify the driveshaft ends to fit it but I don't think it will be anything to do with that. Might be worth checking that nothing is rubbing on the propshaft. Does it make the noise with the engine switched off whilst free-wheeling?? Regards, Martin Link to comment Share on other sites More sharing options...
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