What Causes Clutch Judder??
13-12-2005, 04:45 PM
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What Causes Clutch Judder??
any ideas what causes the car to judder when taking up the biting point when pulling away or when going down a gear 
.??
CheeRS
Craig
NYRSOC
.??CheeRS
Craig
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13-12-2005, 05:24 PM
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ok mate thatnks very mucho... could there be anyother reason or is that about it.? also is it new clutch time if so..?
CheeRS
craig
NYRSOC
CheeRS
craig
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13-12-2005, 05:26 PM
#6
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There are other possibles, like its worn out....
but either way a new clutch is on the cards...
taken from http://www.indiacar.com/infobank/autoclutch3.htm
To over-simplify, a Clutch can 'judder' if :
1) Any one of it's 4-principal Constituents viz - i) The Flywheel face, ii) The Clutch Plate-Assy, iii) The Clutch-Cover/Pressure Plate Assy and iv) It's 'Release Mechanism are 'faulty'.
2) It can also Judder inspite of the above 'set-up' being in order, if the Engine itself is out of tune by way of - i) Ignition Timing and more importantly - ii) If there are 'flat-spots' in the Carb; either due to too lean an idle mixture setting or 'otherwise'.
3) In the 'otherwise' Category come - i) Worn-out Butterfly Spindles and ii) Lack of 'perfect' seal between the Carb mtg Flange/prescribed Gaskets and the Inlet Manifold.
4) If the Flywheel Face is True', the Clutch Disc/Cover' Assy is to OE Specs and the Release Bearing Holder Shaft isn't 'dry' in its top and bottom bushes - assuming the operating Cable is OK - there's no reason for the Pedal to feel hard or the Clutch to Judder.
5) It can also judder due to excessive Slack in the 'Drive-Train' - notably in the 'Final Drive'. A damaged Spider of the Clutch Disc including loss of tension in its springs can also make a Clutch Judder.
random google pick but it seems ok at 1st glance,
Alex
but either way a new clutch is on the cards...
taken from http://www.indiacar.com/infobank/autoclutch3.htm
To over-simplify, a Clutch can 'judder' if :
1) Any one of it's 4-principal Constituents viz - i) The Flywheel face, ii) The Clutch Plate-Assy, iii) The Clutch-Cover/Pressure Plate Assy and iv) It's 'Release Mechanism are 'faulty'.
2) It can also Judder inspite of the above 'set-up' being in order, if the Engine itself is out of tune by way of - i) Ignition Timing and more importantly - ii) If there are 'flat-spots' in the Carb; either due to too lean an idle mixture setting or 'otherwise'.
3) In the 'otherwise' Category come - i) Worn-out Butterfly Spindles and ii) Lack of 'perfect' seal between the Carb mtg Flange/prescribed Gaskets and the Inlet Manifold.
4) If the Flywheel Face is True', the Clutch Disc/Cover' Assy is to OE Specs and the Release Bearing Holder Shaft isn't 'dry' in its top and bottom bushes - assuming the operating Cable is OK - there's no reason for the Pedal to feel hard or the Clutch to Judder.
5) It can also judder due to excessive Slack in the 'Drive-Train' - notably in the 'Final Drive'. A damaged Spider of the Clutch Disc including loss of tension in its springs can also make a Clutch Judder.
random google pick but it seems ok at 1st glance,
Alex
13-12-2005, 05:28 PM
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thing is theres no oil leaking from the engine ( hard to belive i know ) and its a new brand new gearbox thats ust gone in the clucth is an ap organic one which was checked when the box was out and was fine so im well baffeled
CheeRS
Craig
NYRSOC
CheeRS
Craig
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14-12-2005, 07:50 AM
#10
I suspect you did NOT have the flywheel surface ground when you fitted the new clutch? What happens is that when the clutch slips on the flywheel, it heats the surface of it up and creates raised hardened "spots" on it, where the metal has overheated. If you don't have these removed by surface grinding the flywheel, when you fit a new one (especially with an uprated clutch, which is less forgiving in operation), it picks up on these raised hotspots and causes some judder. This is why you should ALWAYS have the flywheel ground when fitting a new clutch.
14-12-2005, 07:58 AM
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Originally Posted by Mike Rainbird
ALWAYS in my opinion. I have ALWAYS has this done, and never had any issues...
14-12-2005, 07:58 AM
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Originally Posted by J871yhk
arr I was assuming you had a std clutch....
uprated ones DO judder.
Alex
uprated ones DO judder.
Alex
You do have a problem somewhere.
14-12-2005, 07:51 PM
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the clutch was put in at the begining of the yaer ( there was no judder then ) the box was taken out about 6months later due to a noise developing the thrust bearing was fooked.. we took the clutch out aswell to see if it was ok..it was but since putting in a new bearing its juddered not a great deal but its there, since then we found the box was goosed aswell so now theres a new box in but the judder is still there
CheeRS
Craig
NYRSOC
CheeRS
Craig
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