cluch noise
Submitted: Monday, Jan 17, 2005 at 21:23
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stans truck
hi all can someone tell me what could be a problem ,ok 1999 landcruiser petrol and gas done 140.000ks and just noticed a noise while the cruiser is in neutral the seem to be a sort of winding noise when you put your foot on the cluch it goes away it might a thrust bearing , dont know the cluch dose not slip or shutter at all hope some can help thanks.
Reply By: Bilbo - Tuesday, Jan 18, 2005 at 00:12
Tuesday, Jan 18, 2005 at 00:12
Odds on - it's the primary shaft bearing at the front of the gearbox. This shaft spins even when you're in neutral, no gear selected and your foot is OFF the clutch pedal. However, it stops spinning when you depress the clutch pedal.
Next best bet - IF there is a needle roller bearing located in the primary shaft where it meets the main drive shaft that supports the 'fat' end of the primary shaft, it could the needle roller bearing. But doubtful - needle bearings generally don't whine and they are nowhere as big as the primary shaft bearing.
Next,next,best bet - IF there is a needle roller bearing located in the flywheel that supports the 'thin' end of the primary shaft, it could the needle roller bearing. But doubtful.
Next,next,next best bet - I don't reckon it's the clutch thrust bearing. This bearing is stationary when your foot is OFF the clutch pedal. It only rotates when your the clutch pedal is depressed. Unless it's been adjusted up really tight to the clutch pressure plate thrust pad. (Unusual for this to be the case)
All of this must be as "depressing" as the clutch pedal itself - 'cos to fix the noise, the gearbox has to come out and it's usual to replace all bearings whilst the box is out - oh and put a new clutch in.
Bilbo
AnswerID:
93702
Follow Up By: rig pig - Tuesday, Jan 18, 2005 at 03:08
Tuesday, Jan 18, 2005 at 03:08
Next,next,best bet - IF there is a needle roller bearing located in the flywheel that supports the 'thin' end of the primary shaft, it could the needle roller bearing. But doubtful.
Bilbo,
This bearing doesn't turn with the clutch out, so hence it won't make a noise
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Follow Up By: stans truck - Tuesday, Jan 18, 2005 at 11:02
Tuesday, Jan 18, 2005 at 11:02
thanks for your input bilbo what would happen if say you were in
the desert and this sharft bearing let go are you stuck or is one of those things just keep making noise for ever and keep giong.
FollowupID:
352722
Reply By: Nino & Kerry- Wednesday, Jan 19, 2005 at 12:20
Wednesday, Jan 19, 2005 at 12:20
Hi mate,
I can't help but think that other posts are looking to deep to early.Bottom line is you have a noise that needs to be fixed. I think that it's just your thrust bearing. If you don,t do anything it will let go, you just can,t pick when or where.
My advice (for what its worth) remove the gearbox and inspect the thrust BRG.It will be obvious if it has dryed out/worn/failed. If it is OK then look further then. If its shot, Fit a new clutch kit and you,re away.
If you are unable to do the work yourself Make sure that you tell the repairer not to proceed to the next step without your OK.
Cheers Nino.
AnswerID:
93912