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Unread 10-24-2014, 09:30 AM   #1
Muddeprived
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clutch shudder when cold

I'm wondering if this is a problem or not. When the jeep is cold, the clutch loves to shudder (whole jeep shudders) when taking off. Once it warms up it stops. It also does this when it's raining out until it warms up as well.

It's a 99 with 92k miles. I'm not sure if the PO had the clutch serviced but he did follow the factory maint. schedule to the dot. I just can't find the papers he gave me cuz we just moved and everything is everywhere.

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Unread 10-24-2014, 11:20 AM   #2
Tj4rocks
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I am not much help to you but mine does the same thing. 97 with 137k on it. Does it mainly when it's cold out but sometimes it will shake so bad it will rattle your teeth. I have plans to put a new clutch and flywheel in it sometime this winter.
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Unread 10-24-2014, 11:31 AM   #3
Jerry Bransford
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New flywheels are rarely needed and are not part of a normal clutch job. Only replace it if it is physically damaged, there's no need to spend that kind of $$$ just because. Go for a Luk clutch kit, they hold up to nearly anything you can throw at it, and they're usually good to past 200k miles... early <100k mile failures are extremely rare.

Last comment, per the Mopar Factory Service Manual, don't have the existing flywheel turned or machined either. It has a slight dome shape on its surface that would be removed by having it resurfaced... yes I know that's a common part of most clutch jobs but don't do it where a TJ is concerned. At the most, use a piece of emory cloth or mild sandpaper to remove any glazing that may be on the flywheel's surface.
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Unread 10-24-2014, 12:39 PM   #4
wwch99tj
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I put a new clutch in at 215k, it had chattered for the past several months... 2 weeks ago the throw out bearing broke at 261k

I replaced everything, flywheel($45), clutch kit(warranty replacement) and found a metal throw out bearing($22), clutch fork and retaining spring($40). The clutch is smoother than it's ever been, I think the throw out bearing was not sliding on the shaft like it should have causing the chatter?

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Unread 10-24-2014, 07:24 PM   #5
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Quote:
Originally Posted by Jerry Bransford View Post
Last comment, per the Mopar Factory Service Manual, don't have the existing flywheel turned or machined either. It has a slight dome shape on its surface that would be removed by having it resurfaced... yes I know that's a common part of most clutch jobs but don't do it where a TJ is concerned. At the most, use a piece of emory cloth or mild sandpaper to remove any glazing that may be on the flywheel's surface.
From the FSM:

"Flywheel machining is not recommended. The flywheel
surface is manufactured with a unique contour
that would be negated by machining."

From research I think that the Unique Contour has been identified as a conical shape...
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Unread 10-24-2014, 09:02 PM   #6
nickkick
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So what or why does it make it shudder when it is cold out is my question.
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Unread 10-24-2014, 09:05 PM   #7
hustler905
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Quote:
Originally Posted by nickkick View Post
So what or why does it make it shudder when it is cold out is my question.
I have no idea, but mine does it too. No oil leak or anything either, so I am stumped. I have decided that it's maybe condensation and find taking off in third rather than first just once seems to cure it. With 4.88s I find I don't need to slip my clutch much at all.

Now that it's no longer a DD, I notice it more. Almost like there's more moisture or condensation to burn off before it grabs smoothly.
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Unread 10-24-2014, 09:41 PM   #8
nickkick
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Maybe I will check the motor mounts and transmission mounts to see if they are worn out. Cold engine might be idling high and jumpy for the worn mounts.
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Unread 10-24-2014, 10:32 PM   #9
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Good to hear I'm not alone with this. I was thinking something similar to brake rotors, how they are sticky when you first stop after it sat all night and it's worse when it rains. It's just annoying though. It's done this since I've owned it (2 years).
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Unread 10-29-2014, 10:34 PM   #10
papaandt
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Me Too!

I just had the same problem. Local Dodge Jeep dealer told me I had hot spots on the flywheel and it needed to be turned to remove them and to put in a clutch kit at the same time. This repair was done and the problem is fixed. I read in this thread that others stated not to turn the flywheel...why would a jeep dealer say to turn the flywheel?
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Unread 10-30-2014, 01:10 AM   #11
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Quote:
Originally Posted by papaandt View Post
I just had the same problem. Local Dodge Jeep dealer told me I had hot spots on the flywheel and it needed to be turned to remove them and to put in a clutch kit at the same time. This repair was done and the problem is fixed. I read in this thread that others stated not to turn the flywheel...why would a jeep dealer say to turn the flywheel?
If the shop has access to the proper resurfacing machine, the flywheel can be resurfaced and the conical shape will be retained... HTH
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Unread 10-30-2014, 06:43 AM   #12
wwch99tj
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Quote:
Originally Posted by papaandt View Post
I just had the same problem. Local Dodge Jeep dealer told me I had hot spots on the flywheel and it needed to be turned to remove them and to put in a clutch kit at the same time. This repair was done and the problem is fixed. I read in this thread that others stated not to turn the flywheel...why would a jeep dealer say to turn the flywheel?
I had to replace my clutch a few weeks ago due to a broken throw out bearing, I replaced the flywheel too and my shutter is completely gone... My flywheel looked perfectly fine but figured while I was in there and after 260k it was due.

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Unread 10-30-2014, 08:15 AM   #13
Muddeprived
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Quote:
Originally Posted by papaandt View Post
I just had the same problem. Local Dodge Jeep dealer told me I had hot spots on the flywheel and it needed to be turned to remove them and to put in a clutch kit at the same time. This repair was done and the problem is fixed. I read in this thread that others stated not to turn the flywheel...why would a jeep dealer say to turn the flywheel?
I'm curious what you paid for that job to be done. Mind sharing?


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Unread 10-30-2014, 11:27 AM   #14
Tj4rocks
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That's why i mentioned about replacing the flywheel, i don't want to have to tear everything apart a second time if the shudder is still there and i didn't do anything to the flywheel. Might as well do it while it's apart.
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Unread 10-30-2014, 03:09 PM   #15
FalloutMaster
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Quote:
Originally Posted by wwch99tj View Post
I had to replace my clutch a few weeks ago due to a broken throw out bearing, I replaced the flywheel too and my shutter is completely gone... My flywheel looked perfectly fine but figured while I was in there and after 260k it was due.

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My TJ had a terrible shudder when slipping the clutch when I bought it. Opened up the tranny and the TOB was barely hanging on, I was surprised it worked at all. Put in a new clutch, throw out bearing and flywheel. It's a hell of a lot smoother then it was but its not perfect. I'm thinking Its my motor/tranny mounts, likely same problem OP is having if its not the clutch/TOB.
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