Shuddering badly, why? |
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Shuddering badly, why? |
Ctrout |
Feb 12 2005, 11:37 PM
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#1
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Member Group: Members Posts: 377 Joined: 20-May 04 From: Mountain Home, ID. Member No.: 2,091 |
My car recently developed a severe shudder and I can't figure it out. It feels like the back end of the car is going to explode or something. It happens when letting out the clutch from a stop in first gear. It doesn't happen when the car is cold, only after it has had a few minutes of driving to warm up. If I rev a bit higher than normal, it doesn't do it. Everything is normal with the car's function except this strange problem. The clutch was replaced about 4 months ago along with the trans shaft seal and rear main seal. I put a jack in the middle of the engine and jacked it up. the car came up with the motor so I think the mounts are fine. Any ideas?
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McMark |
Feb 12 2005, 11:52 PM
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#2
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Motor mounts. (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)
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wrpspddrvr |
Feb 13 2005, 12:35 AM
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#3
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Member Group: Members Posts: 333 Joined: 22-December 04 Member No.: 3,317 Region Association: None |
Hmmm. Try starting in a lower gear. (IMG:http://www.914world.com/bbs2/html/emoticons/lol2.gif)
Seriously, maybe it's clutch chatter? You don't hear about it as much in lower HP cars, but...? Cole (IMG:http://www.914world.com/bbs2/html/emoticons/monkeydance.gif) |
markb |
Feb 13 2005, 12:45 AM
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#4
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914less :( Group: Members Posts: 5,449 Joined: 22-January 03 From: Nipomo, CA Member No.: 180 Region Association: Central California |
Have you readjusted the clutch since installation? You might try that.
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Lou W |
Feb 13 2005, 01:24 AM
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#5
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"Here Kitty Kitty" my ass...... Group: Members Posts: 4,109 Joined: 9-May 04 From: Roseburg, OR. Member No.: 2,039 Region Association: Spain |
My guess is clutch (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif)
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Aaron Cox |
Feb 13 2005, 01:27 AM
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#6
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
sounds like clutch chatter (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif)
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Ctrout |
Feb 13 2005, 01:33 AM
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#7
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Member Group: Members Posts: 377 Joined: 20-May 04 From: Mountain Home, ID. Member No.: 2,091 |
I adjusted the cluthch a few days ago. Didn't help. So what is clutch chatter and how do I fix it? I thought bad motor mounts would be evident when performing the jack test as I mentioned above. Does this not always work? "from a stop in first gear" Is ther a lower gear than first? The feeling when this happens is more like wheel hop than chatter.
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Lou W |
Feb 13 2005, 01:41 AM
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#8
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"Here Kitty Kitty" my ass...... Group: Members Posts: 4,109 Joined: 9-May 04 From: Roseburg, OR. Member No.: 2,039 Region Association: Spain |
I replaced a clutch on a previous car that I owned, I was told that I should look at the flywheel and pressure plate surfaces to make sure that there were no cracks, hot spots or warped areas. These could cause the clutch disc to chatter when engaging or disengaging the clutch. Oh yah, and fluid leaks too. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)
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Brando |
Feb 13 2005, 03:06 AM
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#9
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BUY MY SPARE KIDNEY!!! Group: Members Posts: 3,935 Joined: 29-August 04 From: Santa Ana, CA Member No.: 2,648 Region Association: Southern California |
motor mounts, trans mounts, clutch needing adjustment/replacement, flywheel in poor condition... all mentioned above ^
Mine's been doing this too. Just take it easy, don't pop the clutch and try to take off super-fast. i've done that to break the tyres loose, i think i accelerated the decay of my car's clutch... but i made the tyres squeal! (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif) Only way you can really be certain, is to drop the engine and trans, separate the two, and inspect your clutch and flywheel. This may also be a sign that your clutch is on it's way out. |
Aaron Cox |
Feb 13 2005, 12:04 PM
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#10
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
ive heard that the CV's can make this noise...
Go Check Your CV Joints (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) |
r_towle |
Feb 13 2005, 01:18 PM
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#11
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Custom Member Group: Members Posts: 24,573 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
motor mounts where the bar attaches to the engine...
If those get loose, which they tend to, it will shudder. It smooths out at higher reves because the engine balances out.... If it was a flywheel balance issue or clutch issue you would feel it even more at higher revs. Plus tranny mounts....Look at it this way, the motor was removed and reinstalled 4 months ago...have you retightened all the bolts sisnce that happened???You should on any normal removal and reinstall anyways. Rich |
Joe Bob |
Feb 13 2005, 01:25 PM
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#12
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Retired admin, banned a few times Group: Members Posts: 17,427 Joined: 24-December 02 From: Boulder CO Member No.: 5 Region Association: None |
mounts...BOTH motor and transmission.....if renewing them does not correct the chatter...they prolly needed to be replaced anyways. They are a cheap fix and make the car more driveable.....
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aircooledboy |
Feb 13 2005, 01:29 PM
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#13
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Sweet Pea's 1st ride in daddy's "vroom -vroom" Group: Members Posts: 1,672 Joined: 4-February 04 From: Rockford, IL Member No.: 1,629 Region Association: Upper MidWest |
No, I don't think so man. Only does it when starting out in 1st gear. This is almost certainly a clutch problem. Clutches chatter because the pressure plate is not evenly contacting the disk as the clutch is let out , usually because either the p plate or the fly wheel has worn. It is not a balance problem, but an uneven contact/ uneven grabbing problem. Once the pedal is released, the disk is no longer moving between the p plate and the fly. That is why it stops chattering. |
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r_towle |
Feb 13 2005, 01:49 PM
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#14
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Custom Member Group: Members Posts: 24,573 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
If that were true, it would shutter whenever you re-engage the clutch.
motor mounts and tranny mounts |
Brando |
Feb 13 2005, 02:18 PM
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#15
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BUY MY SPARE KIDNEY!!! Group: Members Posts: 3,935 Joined: 29-August 04 From: Santa Ana, CA Member No.: 2,648 Region Association: Southern California |
Wait, who makes aftermarket engine and trans mounts? How much for new or OEM?
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Aaron Cox |
Feb 13 2005, 04:12 PM
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#16
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
i have solid trans mounts...and stock rubber engine mounts....
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aircooledboy |
Feb 13 2005, 04:14 PM
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#17
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Sweet Pea's 1st ride in daddy's "vroom -vroom" Group: Members Posts: 1,672 Joined: 4-February 04 From: Rockford, IL Member No.: 1,629 Region Association: Upper MidWest |
My V8 was doing exactly what Ctrout describes. Always when letting the clutch out, never when putting it in. On tear down, I found I had a warped p plate. It doesn't chatter putting clutch in because there is no load on it. |
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redshift |
Feb 13 2005, 04:18 PM
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#18
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
Has your car recently seen a picture of mikez's ass? (IMG:http://www.914world.com/bbs2/html/emoticons/huh.gif)
That causes shuddering... oh yeah. (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif) I say it's in the clutch rig, and I tend to think there is a warped pp too, because with it fully engaged, it doesn't shudder, right? If it had seen a picture of mikez's man cleavage... I'd say it needs an acid dip.. If you haven't changed the mounts, it's worth doing! M |
redshift |
Feb 13 2005, 04:19 PM
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#19
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
I lost the number, but seanery gave me a line on solid mounts for cheap.. M |
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Ctrout |
Feb 13 2005, 06:57 PM
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#20
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Member Group: Members Posts: 377 Joined: 20-May 04 From: Mountain Home, ID. Member No.: 2,091 |
I'll start with the mounts when I find some and get the ambition up to do the work. If it ends up being the pressure plate, I'll be surprised. I wouldn't think it would have gone bad so suddenly and after only 4 months of driving.
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