Off to the dealership on the 14th...something's screwed up. - Jeep Wrangler Forum
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Old 01-10-2014, 08:49 PM   #1
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Off to the dealership on the 14th...something's screwed up.

Well, that vibrating noise that I made a post about earlier came back. I thought it was a piece of plastic trim, and I tightened it and it went away, but it seems it was a cooincidence.

Only does it when the drivetrain is fully warmed up and has been operating for a bit. Noise appears to be coming from either the clutch or the transmission. The noise travels up through the gearshift and is clearly audible in the cabin. It's also clearly audible from outside the vehicle.

It only occurs when the engine is under load...either in gear and accelerating or in neutral with the clutch out and revving the engine. If I put the clutch in and rev, the noise is completely absent. It's some kind of vibration within either the transmission or the clutch....something's rapping on something in there.

Took it to the dealership and reproduced the noise for them after they were unable to do it themselves. They immediately were like oh...yes...that's not supposed to sound like that.

They think it's probably just a loose bolt somewhere or something very slightly out of alignment, which is why it only does it once it's nice and hot....they hope to drop the transmission/clutch, find the area and tighten it up, without finding any evidence of actual damage.

I'll find out on Tuesday, which is the soonest they could get me in. Kind of disappointing that my brand new (less than 2 month old, 1400 miles)) Jeep is going into the shop for a drivetrain issue, but I'm hoping it's something minor that they can fix on the spot. If not, either a clutch or transmission replacement will be needed.

So...that kind of sucks huh? I haven't found ANYTHING on this site that sounds similar so apparently I just got very unlucky....and they say they don't have a doner....I'll press them hard for one on Tuesday.

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Old 01-10-2014, 09:40 PM   #2
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Sounds like the throw out bearing.

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Old 01-10-2014, 10:22 PM   #3
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Sounds like the throw out bearing.
Is that a hard fix or something easy?
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Old 01-10-2014, 11:11 PM   #4
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Does it go away when you move the transfer case shifter to the right? if not, you probably have the good old familiar transmission rattle.

There is a long list of people with this problem. I'm one of them.

I had my transmission torn down and rebuilt twice. It didn't fix it and I regret taking it in.

Many people have had new transmissions and even had Chrysler "engineers" flown out to hand build new transmissions with no success.

It's the nature of the beast. Good luck.
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Old 01-10-2014, 11:14 PM   #5
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Originally Posted by Blastek View Post
Does it go away when you move the transfer case shifter to the right? if not, you probably have the good old familiar transmission rattle.

There is a long list of people with this problem. I'm one of them.

I had my transmission torn down and rebuilt twice. It didn't fix it and I regret taking it in.

Many people have had new transmissions and even had Chrysler "engineers" flown out to hand build new transmissions with no success.

It's the nature of the beast. Good luck.
Yes, it DOES go away when I move the shifter slightly. Or if I move it down slightly, with the clutch let out, but not enough to grind the gears.

After reading more, I'm almost sure it's the throw out bearing. Descriptions online of the sound and symptoms are all exactly what I have.
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Old 01-11-2014, 02:49 AM   #6
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In my experiences with a bad TOB they made noise when you either started depressing the clutch pedal, and all the way through its downward travel. I never heard them when the clutch was up. Usually a TOB makes noise when its under load, when the clutch is up the TOB is not under load. It could be the TOB, but I have a feeling that the TOB is not the problem. It sounds to me like something is not properly aligned. Good luck, hopefully you get a speedy resolution to your issue.
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Old 01-11-2014, 03:40 AM   #7
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have you looked into loose heat shields i know it doesnt seem like it but they make the worst noises, on my '07 xterra i had one and it sounded like someone was taking an angle grinder to my tranny. just saying it cant hurt to check
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Old 01-11-2014, 04:15 AM   #8
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have you looked into loose heat shields i know it doesnt seem like it but they make the worst noises, on my '07 xterra i had one and it sounded like someone was taking an angle grinder to my tranny. just saying it cant hurt to check
Unfortunately yes; checking everything under the vehicle that wasn't inside of the engine/tranny was the first thing I did.

The good thing is, I can tell there's really nothing wrong with the transmission itself. There's no whining and the tranny does not grind at all, so the synchros and gears are just fine.

It's got to be something with the clutch assembly, now that I've ducked my head down there a bit more while it was actually doing it. Given that the clutch works fine and there's no bad smell or slippage, hopefully it's just something that can be aligned or tightened and that's it. What part of the clutch, I don't know, but after having read accounts and descriptions of TOB complaints, they all sound pretty much exactly like what I'm experiencing. Slight mis-tension in the cable and there's just enough contact once things get warm to make a little harmless clatter.

Fingers crossed....but man I hate waiting to find out half a week!
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Old 01-13-2014, 04:31 PM   #9
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Sounds like it could be a clutch pressure plate problem.
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Old 01-13-2014, 05:39 PM   #10
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Originally Posted by MHShale View Post

Only does it when the drivetrain is fully warmed up and has been operating for a bit. Noise appears to be coming from either the clutch or the transmission. The noise travels up through the gearshift and is clearly audible in the cabin. It's also clearly audible from outside the vehicle.

It only occurs when the engine is under load...either in gear and accelerating or in neutral with the clutch out and revving the engine. If I put the clutch in and rev, the noise is completely absent. It's some kind of vibration within either the transmission or the clutch....something's rapping on something in there.





.
If a throw out bearing were bad, it would be noisy when you pushed in on the clutch, (engaging the throw out bearing), but since that eliminates the noise/vibration, then IT IS NOT a bad throw out bearing........
Since you have the noise/vibration under load, and in neutral, but not when the clutch is pressed in, (and the input shaft stops turning), tells me that you have a bad transmission input bearing..........
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Old 01-13-2014, 10:05 PM   #11
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If a throw out bearing were bad, it would be noisy when you pushed in on the clutch, (engaging the throw out bearing), but since that eliminates the noise/vibration, then IT IS NOT a bad throw out bearing........
Since you have the noise/vibration under load, and in neutral, but not when the clutch is pressed in, (and the input shaft stops turning), tells me that you have a bad transmission input bearing..........
I'll find out for sure tomorrow. Hopefully they let me continue driving it while the part is on order. It works just fine and doesn't really seem to be getting worse per-se....I just want it fixed.

Most people would be mad I suppose but I've never purchased a new car that didn't have at least one warranty repair within the first few thousand miles.
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Old 01-14-2014, 05:59 PM   #12
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Well...despite me reproducing the noise on the day they first looked at it....I gave it to them all day today and they were unable to reproduce it again. There were different techs working today than last time so nobody had any idea what to look for when I dropped it off. Great use of my time and the friend who drove me all over town. They said that I should bring it in again if it starts doing it. I plan on doing it first thing after work tomorrow.

The head tech was friendly and I actually completely agree with him about not wanting to tear open a brand new transmission without being more sure of what they're looking for...but if the same guy had been at work today as the day I showed them the issue (last friday), there would have been no confusion.

Ugh. More to follow.

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