ok i was sitting in mc'ds drive thru this morning. put the car in nuetral, and let out on the clutch pedal and i could hear a rattleing like noise coming from under the hood or car one or the other... and when i put the clutch pedal back in it stopped any clue???
this is a 99 cav isuzu tranny
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clutch chatter. bad throw out bearing
Okay clutch/manual trans problems can be diagnosed simply by what the car is doing, and is the clutch engaged or not.
So you say clutch disengaged sound, clutch engaged no sound.
Clutch engaged no sound, means the pilot bearing is fine. However like the above poster stated, it is most likely you throw out bearing, also called a release bearing.
You will be removing the clutch to replace it, it is between the pressure plate and flywheel I do believe.
- 2004 Cavalier - 124k, owned since new
about 150 just for the slave throwout acc you mite as wail put a clutch in and i mite sa a NEW SEAL ON THE INPUT SHAFT MINE WENT OUT AT 189,000 MILES KILLED THE PORE ISZUSU
a friend of mine mis-shifted his talon at the track one day (3rd to 2nd, data logger stopped at 10k rpm's) and had a horrible rattle sound while the clutch was out, but ran fine and the noise stopped while the clutch was in, we pulled the engine and found that 4 out of 7 fly wheel bolts had backed off and were rattling, when you'd put the clutch in it the pressure plate would sandwich them quiet. May not be your issue, but possible
The throwout bearing isnt between the pressure plate and flywheel. It sits on the input shaft right up against the tranny and disengages the pressure plate.
well looks like i better prepare for tranny upgrades, i made a post in the transmission forum, had a few questions if you guys can help feel free...
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gtpsunfire wrote:The throwout bearing isnt between the pressure plate and flywheel. It sits on the input shaft right up against the tranny and disengages the pressure plate.
Okay but it disengaged the pressure plate which connectso the flywheel, which is mounted on the engine.
The input shaft is always connected from the engine to the trans, just that the pressure plate isnt always engaged agaisnt the flyweheel, so what I said was correct.
- 2004 Cavalier - 124k, owned since new
my car does this from time to time. i have a ACT clutch and Spec flywheel.
i am not worried. i have a newer throw out bearing. sometimes it makes alot of noise, sometimes it dont.
when it makes that noise, try pushing the clutch in and letting it out again, see if it goes away.
i wouldnt worry about it until you cant shift, or move. lol
Rob you're incorrect. You don't have to take off the clutch to replace the TOB. The other dude was right.
O noes!
From engine to trans...
Flywheel -> Friction Disc -> Pressure Plate -> Release Bearing -> Clutch Fork
if the fork pressed on the pressure plate, it wouldnt work at all, the release bearing is inbetween the fork and fingers on the pressure plate so that the pressure plate can spin with the flywheel.
'95 Saturn SL2a
'06 Chevy Silverado 2500 Turbo Diesel
'07 Chevy Impala SS
The J throw out bearings are known for making this noise. I have taken a car mkaing this noise to 129k and was fine. Also turn your A/C off (if it was on), and see if the noise goes away. The A/C compressor are noisey as well.
FU Tuning
I have the same problem. I have a stage 2 SPEC clutch and SPEC flywheel on the getrag (2001). I just contributed it to the fact i changed something so the noise is bound to change. It runs fine so i dont worry.
PSN ID: Phatchance249
Same here... new TO bearing and it still makes that noise. I just ignore it half the time
It's a simple reason. At least on my NVG and on the Isuzu - the throwout bearing isn't bolted down... so it rattles against the pressure plate and bell housing. Sometimes it's bad, sometimes it's nothing
Don't worry about it.
-Chris-
-Sweetness-
-Turbocharged-
Slowly but surely may some day win this race...
Same thing...Spec III and Spec flywheel...had the noise since day one and had it after the new parts went in...even swapped the TOB and it's still there....
Eh...old man with a Corvette now...it was bound to happen sooner rather than later right?
I don't know how old this post is but I might check my Input Bearing and in a few rare Cases i've heard how a loose arm can make that noise. You might check it out
It did it when I had the Isuzu and it does it now with my NVG tranny. Both new throwout bearings. It's just how they are. Don't worry about it.
2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R
mine used to do that really bad...so i put a act clutch and new throw out berring in it.. apparently my flywheel is perfect....it still does it....i wouldnt worry bout it
*****better luck next time honda boy*****
