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Topic Review (Newest First)
11-12-2014 03:03 PM
al2ride I believe it's how you are driving it. I had Miata turbo that you could shift gears in milliseconds. I then bought a Mustang that clunked in the lower gears. I took it to the dealer and they told me there was nothing wrong with it and sure enough when I drove another one it was the same way. I was spoiled with the Miata tranny and had to learn to drive the Mustang. The same thing could be happening to you. If in doubt, take it in and ask to drive another one.
11-11-2014 11:06 PM
truraptor
my fix

Quote:
Originally Posted by jceo View Post
I have a slight clunk between shifts in the lower gears on my 2013 JKU 6 Speed 3.73 with less than 2k miles. It happens when the clutch engages (when I take my foot off) when starting out in first, going into second, third and fourth. It also seems to occur if I am driving in first or second in a parking lot and momentarily let off the gas. When I start to accelerate again it will "clunk" as any slack in the drivetrain is taken up.

The noise seems to be coming somewhere from the transfer case back. I know there are threads relating to transmission noise but it does not seem to be coming from the trans. The best way I can describe it is a slight clunk. I can avoid it if I really feather the clutch on the way out so that it engages very gradually but normal shifting seems to produce the noise. Does anyone else have this noise? Is it normal?
I know this is an old thread, but I just wanted to put my .02 in for anybody out there experiencing this. Just got a 2015 JK and had this 'clunk' on every upshift from 1-4. I've driven lots of other manuals and was shifting this the same. Took it to the dealer, as I was worried about the durability of this thing, especially with it being a new vehicle, and they of course said nothing's wrong with it, even though I was able to reproduce it with a tech in the car. He said it was just driveline slack - I wasn't satisfied.

I was complaining to my friends, and let one of them drive it (who's been driving manuals for a lot longer than I have), and it shifted like butter. I was pissed/jealous that I couldn't figure it out so I took some laps around the circular road around the mall (don't call me a mall-crawler, it was just convenient!) trying different things. What worked for me, was after putting the clutch all the way down and shifting, I'd wait half a second, then start releasing the clutch the same way I've done on any car. Boom - issue fixed. It would actually clunk on every single shift once the car was warmed up before. Now I don't get clunks.

Not saying you don't have an actual vehicle issue, but I thought I did and it turned out I was just shifting wrong. ^That's how I shift now and I don't get the clunks anymore.
05-07-2013 01:46 AM
Stevezie Yep...there can definitely be a normal clunk with a manual...like an earlier poster said, usually someone not shifting smoothly or being a little lazy on the stick with get it...I've owned or driven hundreds of manual cars from jeeps to $300,000+ sports cars(didn't own those...wish I did!) and I could clunk it if I wasn't paying attention.
BUT, with that said..it doesn't mean that your clunk is normal..there is a driveline slack that can be clunked, but if you're a competent driver, it should be more accidental than regular.. maybe yours does have an issue.
Glad I basically offered no help and took up space here...:-)
05-07-2013 12:59 AM
SilverSport
Quote:
Originally Posted by Scoutnad View Post
The 1976 Accord I learned to drive stick on didn't do this.
My dad's 1977 Chevy van with three-on-the-tree didn't do this.
My friend's 1978 CJ (three speed) doesn't do this.
My 1979 Scout didn't do this.
My 1994 Ranger didn't do this.
My 2002 Saturn doesn't do this.
My buddy's 2003 TJ doesn't do this.
My coworker friend's 2005 Mustang doesn't do this.
My girlfriend's 2006 Mini doesn't do this.
My other coworker's 2012 Challenger R/T doesn't do this.

So what's the precedent for this play to be considered normal?
The precedent for me is every manual trans equipped vehicle I have owned exhibited this characteristic, some only slightly, others like my Jeeps were more noticeable.
05-06-2013 08:50 PM
Atomic Decals Owner I have noticed it too on my 07. Only have had the Jeep a year, and that clunk comes and goes. Figured it was a little slack in the driveline depending on my driving habits, like others previously stated.
05-06-2013 08:46 PM
Scoutnad
Quote:
Originally Posted by SilverSport View Post
Typically normal. There is a small amount of play in the drive line. When the clutch is released, the play is suddenly taken up.
The 1976 Accord I learned to drive stick on didn't do this.
My dad's 1977 Chevy van with three-on-the-tree didn't do this.
My friend's 1978 CJ (three speed) doesn't do this.
My 1979 Scout didn't do this.
My 1994 Ranger didn't do this.
My 2002 Saturn doesn't do this.
My buddy's 2003 TJ doesn't do this.
My coworker friend's 2005 Mustang doesn't do this.
My girlfriend's 2006 Mini doesn't do this.
My other coworker's 2012 Challenger R/T doesn't do this.

So what's the precedent for this play to be considered normal?
05-06-2013 06:26 PM
kik
Quote:
Originally Posted by NewJeepFriend View Post
I have a 2013 JK Sport S (2 door) with 3.73's and have a similar situation when I hear a clunk noise when shifting in the the lower gears. I just assumed it was the way I shifted, but notice it would disappear if I consciously release the clutch slowly.
If you do this it will do it alot less. X2 with ESP and SilverSport. Maybe my 10 will do it once in awhile. But, for the most part I'm able to shift without the "clunk".
05-06-2013 02:17 PM
ESP Pretty normal. I have the same thing in my 2013 and in my older 2010.
05-06-2013 02:14 PM
SilverSport Typically normal. There is a small amount of play in the drive line. When the clutch is released, the play is suddenly taken up.
05-06-2013 02:07 PM
gsn
Quote:
Originally Posted by jceo View Post
I have a slight clunk between shifts in the lower gears on my 2013 JKU 6 Speed 3.73 with less than 2k miles. It happens when the clutch engages (when I take my foot off) when starting out in first, going into second, third and fourth. It also seems to occur if I am driving in first or second in a parking lot and momentarily let off the gas. When I start to accelerate again it will "clunk" as any slack in the drivetrain is taken up.

The noise seems to be coming somewhere from the transfer case back. I know there are threads relating to transmission noise but it does not seem to be coming from the trans. The best way I can describe it is a slight clunk. I can avoid it if I really feather the clutch on the way out so that it engages very gradually but normal shifting seems to produce the noise. Does anyone else have this noise? Is it normal?
Clunk clunk clunk, can you post a video of it for sound? What you seem to be hearing and describing is the flywheel coping with the difference in rotation from the engine and the transmission, and I believe, and Im pretty sure it is normal, as I can reproduce a clunk when not shifting properly or lazily, in any manual trans. The better you shift, the less you hear it or you wont hear it at all. And if you let off the gas it will carry on in its own momentum and if you accelerating again it will "clunk-adjust" to sync the engine with the trans. Anything that causes the engine and trans to go at different speeds will produce a clunk (depressing clutch fast, letting go of the clutch (dropping it), shifting up at lower rpms or too slow without blipping the gas to bump the rpms, shifting down too slow without blipping the gas, etc)

But again, I would need a sound, since your clunk may be difference from my clunk ;b
05-06-2013 02:07 PM
NewJeepFriend I have a 2013 JK Sport S (2 door) with 3.73's and have a similar situation when I hear a clunk noise when shifting in the the lower gears. I just assumed it was the way I shifted, but notice it would disappear if I consciously release the clutch slowly.
05-06-2013 02:01 PM
firestrokesocal My 2012 Unlimited with a 6 speed had that.. Its in the dealer for broken shift tangs or tabs... Mine clunked almost like a shock to the driveline...
05-06-2013 12:28 PM
OffRoadWarrior If it's worth anything my '13 6 Speed with 3.73's does not clunk. However I test drove two 6 speeds with 3.21's which had terrible clunks, almost like a ujoint was bad.

I've read on here a few stories where people had driveline issues from the fty. Wait for more people to reply...
05-06-2013 12:13 PM
jceo
Slight Clunk Between Shifts 2013 JKU 6 Speed

I have a slight clunk between shifts in the lower gears on my 2013 JKU 6 Speed 3.73 with less than 2k miles. It happens when the clutch engages (when I take my foot off) when starting out in first, going into second, third and fourth. It also seems to occur if I am driving in first or second in a parking lot and momentarily let off the gas. When I start to accelerate again it will "clunk" as any slack in the drivetrain is taken up.

The noise seems to be coming somewhere from the transfer case back. I know there are threads relating to transmission noise but it does not seem to be coming from the trans. The best way I can describe it is a slight clunk. I can avoid it if I really feather the clutch on the way out so that it engages very gradually but normal shifting seems to produce the noise. Does anyone else have this noise? Is it normal?

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