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Old 06-21-2013, 02:50 PM   #1
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Jeep Shutters when I let out the Clutch on my 97 TJ

I recently had a new clutch put in and I've noticed a shutter when I let out the clutch in first gear, the stick shift will shake back and fourth, maybe even a slight amount in second gear. Flywheel was turned with the clutch job.

Thanks in Advance!

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Old 06-21-2013, 03:59 PM   #2
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Check the driveshaft u joints an make sure they are tight.

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Old 06-21-2013, 04:38 PM   #3
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Give it more throttle when taking off.
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Old 06-21-2013, 06:47 PM   #4
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Originally Posted by herndo View Post
Flywheel was turned with the clutch job.
You're not supposed to turn a flywheel. A slight grind to remove glaze is all that is supposed to happen.. Remove and replace.
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Old 06-22-2013, 01:15 PM   #5
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You're not supposed to turn a flywheel. A slight grind to remove glaze is all that is supposed to happen.. Remove and replace.
Actually, just a little Emory cloth to it is all you really need.

To the OP: the flywheel is dome shaped from the factory. If someone machines it flat, the clutch will catch the flywheel all at once instead of a little at a time like it is supposed to do.
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Old 06-22-2013, 03:17 PM   #6
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Here's the problem I have with the idea of a domed flywheel. How does that work, exactly? The clutch touches the domed part first, preventing the entire clutch from grabbing at once, right? How does the clutch disc contact the higher portion first without itself becoming worn in that area? Over time, and I don't think it would take very long, the clutch would become worn to perfectly match the contour of the flywheel. Which, if you think about it, is no different from a perfectly flat flywheel. I've searched, and all I find are people quoting the FSM or quoting someone else quoting the FSM. I'd like to see actual measurements of the flywheel and clutch disc, both new and unused and after a few thousand miles for comparison.
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Old 06-22-2013, 03:26 PM   #7
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I see what you are saying. But that is what the FSM says. So I'm not sure!
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Old 06-22-2013, 03:44 PM   #8
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Originally Posted by jherrington View Post
I see what you are saying. But that is what the FSM says. So I'm not sure!
I'm not trying to start an argument. It's just something I've always wondered.
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Old 06-22-2013, 03:45 PM   #9
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Quote:
Originally Posted by herndo View Post
I recently had a new clutch put in and I've noticed a shutter when I let out the clutch in first gear, the stick shift will shake back and fourth, maybe even a slight amount in second gear. Flywheel was turned with the clutch job.

Thanks in Advance!
Did it shudder before replacement and did it start immediately after the replacement or is this a new issue ?
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Old 06-22-2013, 04:23 PM   #10
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I'm not trying to start an argument. It's just something I've always wondered.
I'm there with you.

But, now that I thought about it, when we talk about engine clearances and such, we are talking about .0001 inches. So, I suppose that holds true with the flywheel and that it's dome shape isn't noticeable to someone who doesn't know it's there.
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Old 06-22-2013, 08:17 PM   #11
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Back to the post. My 97 does it also and also in reverse. I am thinking train mount but have not gotten under it yet.
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Old 06-22-2013, 09:01 PM   #12
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Back to the post. My 97 does it also and also in reverse. I am thinking train mount but have not gotten under it yet.
If it happened right after you got your clutch done, then your clutch is your problem. If you just tried to fix something, and now all of the sudden you've got a problem, don't go suspect its something completely different.
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Old 06-22-2013, 09:09 PM   #13
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If it happened right after you got your clutch done, then your clutch is your problem. If you just tried to fix something, and now all of the sudden you've got a problem, don't go suspect its something completely different.
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Old 06-23-2013, 06:14 AM   #14
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Did you replace the transmission mount? If not I would suspect that . The only time I've ever had a shudder like that the trans mount was toast. HTH
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Old 06-23-2013, 09:01 AM   #15
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I've only had the Jeep for about a month. I don't remember it doing this shutter before, my original issue was that I was having trouble going into reverse, it would grind 90% of the time. This was the reason for the new clutch. Right after the clutch installation it didn't shutter, it's seems to have recently started doing this, maybe a week after the clutch installation.

Thanks
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Old 06-23-2013, 09:12 AM   #16
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Originally Posted by herndo View Post
I've only had the Jeep for about a month. I don't remember it doing this shutter before, my original issue was that I was having trouble going into reverse, it would grind 90% of the time. This was the reason for the new clutch. Right after the clutch installation it didn't shutter, it's seems to have recently started doing this, maybe a week after the clutch installation.

Thanks
The reason it grounded going into reverse was because reverse, doesn't have synchros. When you come to a stop, put it in first gear and with out letting the clutch out, put it in reverse. This synchronizes the gears allowing you not to grind going into reverse.
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Old 03-29-2014, 11:31 PM   #17
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Any update on this? This same issue is happening to my '98 before and after new clutch kit, flywheel. I'm thinking it's a weak slave cylinder. Haven't changed it....yet.
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Old 03-29-2014, 11:47 PM   #18
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Originally Posted by Zdrisko View Post
Any update on this? This same issue is happening to my '98 before and after new clutch kit, flywheel. I'm thinking it's a weak slave cylinder. Haven't changed it....yet.
Don't think that will cause it at all. Here are common causes in a cool pic.

Edit for new jobs I like the contamination one and the pilot bearing as it has needle bearings in it and I don't trust many mechanics to care if it's clean or the bearings are still there after they drop it in the floor. If you did it your self you care so no clue.
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Old 03-30-2014, 12:04 AM   #19
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Don't think that will cause it at all. Here are common causes in a cool pic.

Edit for new jobs I like the contamination one and the pilot bearing as it has needle bearings in it and I don't trust many mechanics to care if it's clean or the bearings are still there after they drop it in the floor. If you did it your self you care so no clue.
Partially engaged clutch wouldn't create shudder?
Bearings are new and clean.
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Old 03-30-2014, 12:10 AM   #20
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You do the job?

My luk came with light oil on the pressure plate I cleaned off with brake cleaner. Pretty sure that would cause it if I missed that.
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Old 03-30-2014, 12:53 AM   #21
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You do the job?

My luk came with light oil on the pressure plate I cleaned off with brake cleaner. Pretty sure that would cause it if I missed that.
Yes, and did the same. Brake cleaner was used. Apologies for short replies. Tired, furious and ready to set fire to a jeep.

Google, JF, WF, nothing yields a solid possible fix for this yet hundreds of people have this same issue.

It done this before the new clutch and flywheel was installed and is still doing it. The only thing that hasn't been changed is the slave cylinder. Also, before and after the new clutch and flywheel, it's (most of the time) difficult to get into first and reverse gears. Syncing the first to reverse trick rarely works. Today after testing it, coming to a stop, from first to reverse, I could hear and feel the reverse gear spinning as I slowly tried to engage reverse and it was spinning fast.

This makes me believe it's the slave cylinder.

It didn't always do this. Only for about 6 months. The shudder and select difficulty is what made me think the clutch was bad originally...
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Old 03-30-2014, 09:31 AM   #22
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Burn the clutch up a little to break it in.
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Old 03-30-2014, 11:25 AM   #23
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Yes, and did the same. Brake cleaner was used. Apologies for short replies. Tired, furious and ready to set fire to a jeep. Google, JF, WF, nothing yields a solid possible fix for this yet hundreds of people have this same issue. It done this before the new clutch and flywheel was installed and is still doing it. The only thing that hasn't been changed is the slave cylinder. Also, before and after the new clutch and flywheel, it's (most of the time) difficult to get into first and reverse gears. Syncing the first to reverse trick rarely works. Today after testing it, coming to a stop, from first to reverse, I could hear and feel the reverse gear spinning as I slowly tried to engage reverse and it was spinning fast. This makes me believe it's the slave cylinder. It didn't always do this. Only for about 6 months. The shudder and select difficulty is what made me think the clutch was bad originally...
You can rule out the slave cylinder by operating the clutch with a wood dowel instead. Remove slave cylinder. Have someone inside. You can communicate well with or vice versa. Operate the release fork with a wood dowel see if it shifts fine. I would have the vehicle secure on jack stands and the t case in neutral. Also don't let the pedal get pushed with the slave out or it will ruin it. Good luck brother.
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Old 03-30-2014, 11:40 AM   #24
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Is there any slop in the pinion bearing?
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Old 03-30-2014, 12:23 PM   #25
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Is there any slop in the pinion bearing?
It was checked right before the clutch job.
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Old 03-30-2014, 05:39 PM   #26
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The reason it grounded going into reverse was because reverse, doesn't have synchros. When you come to a stop, put it in first gear and with out letting the clutch out, put it in reverse. This synchronizes the gears allowing you not to grind going into reverse.
this post was very helpful. Thank you!

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