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  #1 (permalink)  
Old 04-10-2006, 07:19 PM
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S10 grinding! Knowbody knows?!

My friend has a 94 S10 that is having a problem know one seems to be able to diagnose. Its is slipping and grinding when torque is applied. It does it in all gears but heres where it gets weird. It only does it when the clutch is not fully engaged! If you drop the clutch its fine! The grinding noise sounds a lot like shifting with no syncs but the trans stays in gear just fine. He's having a new clutch put in, but I don't see how it could be a clutch. Does anybody have any ideas? Its a fun lil puzzle that has me baffled.

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Old 04-10-2006, 09:31 PM
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Do you mean the transmission grinds while trying to shift with the clutch depressed?

If so .... synchronizers?

Perhaps the clutch is not releasing completely. Just some thoughts I have for consideration.

Air in the clutch hydraulics ... unless of course the clutch is mechanical.

Wrong pressure plate, throw out bearing or clutch disk was installed.

Transmission input shaft siezing in the end of the crankshaft
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Old 04-10-2006, 09:37 PM
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No it is in gear when it happens, any gear.. It has no problem shifting. It is a hydraulic clutch.
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Old 04-10-2006, 09:39 PM
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throw out bearing?
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Old 04-11-2006, 12:25 PM
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noise

x2 for the throwout bearing

Keith
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Old 04-11-2006, 04:26 PM
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Can you guys explain why you think its the throwout bearing? I might learn something. How is it causing the grinding noise?
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Old 04-11-2006, 05:09 PM
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only time the throw out bearing has any pressure on it is when you depress the clutch. they are prone to wear, especially if you ride around with a foot on the clutch.

and it makes a grinding noise.....
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Old 04-11-2006, 05:17 PM
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A worn throw out bearing will make a grinding noise because if the bearings are bad then they are not round anymore. Also as a clutch disc wears...the fingers on the pressure plate come out further....that could cause the throw out bearing to turn even when the clutch is not released, thus it will wear out your throw out bearing.
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Old 04-11-2006, 07:16 PM
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Cool. I did learn something. Well it seems like a good mechanic would know immediately what it was when they heard it. I should find out tomorrow what it was for sure. I will let yall know. Thanks.
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Old 04-11-2006, 07:31 PM
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Well..If he has a new clutch disc, pressure plate, and throw out bearing intsalled and set up and adjusted right as well as surfacing the flywheel....he should be in good shape. Let us know how it all turns out.
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Old 04-12-2006, 05:31 PM
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Well the mechanic could not find a problem with any of the clutch parts! He is going to install a used transmission to remedy the problem. My friend is stressing and so am I cuz I have to drive him everywhere. I sure hope this guy knows what he's doing. I don't understand whats going on with this thing. I want the old tran.s to take apart and get to the bottom of this crazy problem. If it is indeed the trans.
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Old 04-12-2006, 05:37 PM
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It could be bad bearings on the input shaft of your trans. The clutch rides on the input shaft so sometimes it makes diagnosis difficult. You just have to tear things apart and go to looking.
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