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Old 05-20-2012, 08:17 PM   #1
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2012 Manual Tranny Issues

Hello everyone, newbie jeep owner here. Just took delivery of a 2012 2-door sport w/ manual. I have put about 700 miles on it and I have started to notice a bit of "chunkiness" of the transmission. So, I turned the radio off and really started listening as I drove. I noticed some clicking and clunking between shifts 1-3 when feathering between the gas and clutch. If I really let it slow (I mean really slow), it doesn't happen. I have driven many manuals before and never had this problem. My buddy drove it, and he feels that its just because its just heavy duty. I did some research on this forum, and I have noticed that others seem to have chunky manuals as well. Someone suggested changing out or adding tranny fluid due to the dealerships improperly checking before release to customers. I'm starting to feel like I should have got an automatic. Any advice would be much appreciated.

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Old 05-20-2012, 09:59 PM   #2
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My 2011 did this and so does my 2012. Let the clutch out a little too fast in 1st or 2nd and you get the noise. Hard to put in words but its like a "shock" to the driveline. I consider it normal. On a side note, my 2012 appears to move more smoothly between gears. Less clunky like my 2011.
Makes me wonder if Chrysler changed something in the synchros.

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Old 05-20-2012, 10:27 PM   #3
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same problem, I been revving up a little past 3k on Tach. And It goes away. Got 1500 on mine and Ive gotten alot better with it. But every now and then It pisses me off.
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Old 05-21-2012, 12:04 AM   #4
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Same here on my 2012 manual. Especially noticeable on down shifts. Off road it was very noticeable and very clunky. I'm about 4500 on the odometer. Keep saying I'm going to take it in to have the dealer look at it, but haven't had time.
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Old 05-21-2012, 01:18 AM   #5
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mine is also clunky and in the lower gears i get a diesel engine like sound. Im also getting a low tone rattle from inside the trans in all but 5th amd 6th. It has gotten better with miles. Im up to about 800. My main gripe is the difficulty in rev matching on downshifts due to the throttle lag. Also the 2nd gear snychro feels pretty bad.Still love it though. I drove my 200sx for the first time since i got my jeep and the shifting felt like a knife through butter. The 200 even has a bad 2nd gear snychro and it was still smoother than the wrangler lol.
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Old 05-21-2012, 12:00 PM   #6
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That is happening to my 2012 at 1500 miles. I'm not sure if it is a problem, but when it happens I think to myself that I should have slipped the clutch a bit more. It kind of feels and sounds like your dropping the clutch. It reminds me most of shifting a mountain bike and the pedals catching up to the slack in the chain.
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Old 05-21-2012, 12:19 PM   #7
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You are gonna have it guys. I have 10K on my 12. Its not strictly a "manual" shift. There is a...damn, can't think of the word. A computer linked mod that interacts with your shifting. I've already had my transmission replaced due to it kicking out of 3rd. Now after the replacement it is starting the same thing in 4th. It will probably be a recall but not a biggy since it is covered but watch for it. With the hill start and 2 sec delay on the brake/clutch it does make things confusing but when climbing its handy as hell. They "Jeep" will figure it out and fix it for you. My dealer is awesome. And yeah, it pisses me off also but its a jeep. LOL
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Old 05-21-2012, 02:10 PM   #8
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Didn't someone mention in another thread that their manual tranny in their 2012 only had 1/2 the fluid required in it from the factory? Did any check to make sure the fluid level was correct? Not sure how you would check it on the manual transmission but just something to look at or at least make the dealer look at if there is a problem.
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Old 05-21-2012, 03:01 PM   #9
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Hmmm...I just though I owned a Jeep and not an Audi.
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Old 05-21-2012, 04:31 PM   #10
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I've always thought that shifting a JK gearbox felt like shifting an '84 U-Haul truck and it's part of the fun for me. If I want smooth, precision shifting, I jump back in the S2000.
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Old 05-21-2012, 05:05 PM   #11
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Definately check your fluid which is easy to do. If it's fine, then really what you have is a pretty normal 6 spd. At certain times it will sound "clunky", depending upon the rpm's and your clutch release. If you "baby" it, it will sound worse, and I'm not saying that you do. Firm and steady and a smooth clutch for less noise. When you shift you will get a distinct two "clicks" from the trans. That's normal also. Some are less noisy than others but as long as your fluid level is where it should be you're fine.
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Old 05-21-2012, 05:55 PM   #12
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Originally Posted by Megafriday View Post
I've always thought that shifting a JK gearbox felt like shifting an '84 U-Haul truck and it's part of the fun for me. If I want smooth, precision shifting, I jump back in the S2000.
Had an 2004 s2k, miss the hell out of it. Handled and shifted like a dream. Can't beat 8k redline Still love my 2012 JK, in a different way of course.
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Old 05-21-2012, 06:22 PM   #13
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Had an 2004 s2k, miss the hell out of it. Handled and shifted like a dream. Can't beat 8k redline Still love my 2012 JK, in a different way of course.
Mine's a 2003 and I'm considering letting it go because the Jeep is as fun to drive (as you said, in a different way). Plus, a high rpm shift in the Jeep doesn't attract the law's attention quite like a wound-out S2K!
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Old 05-21-2012, 06:31 PM   #14
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Originally Posted by Megafriday
I've always thought that shifting a JK gearbox felt like shifting an '84 U-Haul truck and it's part of the fun for me. If I want smooth, precision shifting, I jump back in the S2000.
Lol true

Def takes I while to get used to. Especially coming from a Tj.

I found out "slow" is better when shifting. Same with throttle/gas. Seems less is more with the Jk.
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Old 05-21-2012, 06:32 PM   #15
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My 2012 JK is popping out of 4th gear. I've went to the dealer and had the standard replacement parts put in but it is still happening and now it seems as if the dealership doesn't want to do anything about it. Is there anyone or a website at Jeep that I can go to? Thanks!
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Old 05-21-2012, 06:42 PM   #16
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Originally Posted by ShelbyG
My 2012 JK is popping out of 4th gear. I've went to the dealer and had the standard replacement parts put in but it is still happening and now it seems as if the dealership doesn't want to do anything about it. Is there anyone or a website at Jeep that I can go to? Thanks!

They replace the boot yet?

And are you shifting slow and making sure your shift is fully engaged ?

Yes/yes, time to go to another dealership
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Old 08-07-2012, 08:36 AM   #17
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Sorry to revive an old thread...

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mine is also clunky and in the lower gears i get a diesel engine like sound. Im also getting a low tone rattle from inside the trans in all but 5th amd 6th. It has gotten better with miles. Im up to about 800. .

^^^
This for me.

I've got about 600 miles on my 2-dr jk 2012 manual, and just this morning it started rattling quite loudly in gears 1-4 around 2,000 -3,000 RPMs. I had the top down yesterday and cruised all over town and did not hear this. Got in today and on the way to work noticed it. At first I thought I didn't secure the soft top or something, but then soon realized it is coming from the shifter. Definitely a low tone rattle like something is loose.

No popping out of gears or anything like that. Definitely not the normal shaky, bumpy shifter noise or anything like that. I actually like that it shakes and jumps around. This is different and definitely a "new" noise and kind of annoying. Hopefully it's nothing but it's got me worried.

Anybody else have this happen and if so, did you do anything to fix it or find out what is causing it?

Thanks for any help.
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Old 08-07-2012, 09:53 AM   #18
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I've owned manual vehicles from 1988 - 2012 models, and I can honestly say that a lot of what's being discussed in this thread is just the nature of a manual transmission. It's just normal occurance that you're going to get with a transmission that's manually shifted and gets powered by a hard linkage (clutch) rather than a torque converter. You're going to get clunks, rattles, vibes, etc.

The JK trans. does have some issues that I've never seen before such as the excessive shifter wobble caused by the shatty transmission mount design and the tough reverse "gate" you have to shift through to back up. So there are areas they could improve on. But after 2,500 miles on mine I can honestly say that for the most part, it's very average and par for the course. There's nothing here worth bugging the dealership over.

If it's popping out of gear, then yes you definitely need to get that addressed. Make sure you are following the instructions in the owner's manual also. Don't ride the clutch pedal, shift properly when accelerating, etc. etc.
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Old 08-07-2012, 10:16 AM   #19
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Sorry to revive an old thread...




^^^
This for me.

I've got about 600 miles on my 2-dr jk 2012 manual, and just this morning it started rattling quite loudly in gears 1-4 around 2,000 -3,000 RPMs. I had the top down yesterday and cruised all over town and did not hear this. Got in today and on the way to work noticed it. At first I thought I didn't secure the soft top or something, but then soon realized it is coming from the shifter. Definitely a low tone rattle like something is loose.

No popping out of gears or anything like that. Definitely not the normal shaky, bumpy shifter noise or anything like that. I actually like that it shakes and jumps around. This is different and definitely a "new" noise and kind of annoying. Hopefully it's nothing but it's got me worried.

Anybody else have this happen and if so, did you do anything to fix it or find out what is causing it?

Thanks for any help.
Yeah, the rattle (inside the trans) is a common problem, but not normal. Someone had the same issue as us and took it in. The dealer tore down the trans and found that the 3rd/4th synchros were loose. That sounds very plausible to me, given the sound and feel.

I've driven a massive amount of manuals from the early 80s up to now. It's all i drive. including manual econoboxes, sports cars, vans, trucks, diesels, 4/5/6 speeds with 250k miles on them, fwd/rwd/awd, german, japanese, french, italian, american, british, etc.

this is by far the worst manual transmission in terms of the synchros, noise and clunkyness. still, gotta love it.
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Old 08-07-2012, 10:24 AM   #20
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So yesterday (about 600 miles) I started hearing the same sound.

I had my wife crawl in the back (top down) as we thought it was our tire carrier or hi-lift rattling.

It is coming from the muffler...might be a loose clamp but it sounds like it is in the muffler. Once it warms up, hit it with your foot good, and you will probably hear the rattle inside.

I'm going to take it in for a look at the dealer soon.

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Old 08-07-2012, 03:32 PM   #21
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Hmm interesting... I'll take a look at the muffler, but for me, it most certainly sounded like it was coming straight from the shifter. I might need someone in the jeep with me to get their ear closer to the sound as I was swerving off the road trying to do it myself. And oddly, I went out at lunch today for a ride in the jeep and didn't hear it. I guess I'll see what it does on my ride home and tomorrow morning...

thanks.
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Old 08-07-2012, 03:53 PM   #22
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Old 08-07-2012, 04:09 PM   #23
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Any sound is a bad sound. I had a minor rattle in mine and they are currently in the process of rebuilding the entire thing. This is disappointing when I own a 2012 with 2200km's on it. I'm starting to wonder why they haven't recalled any units yet, even with the the number of people who have the issue.

I'm a first time jeep buyer, and even with this problem I still seem to love the ride and feel of it.
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Old 08-07-2012, 04:13 PM   #24
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the only audible sounds i hear ..and actually thought it was the engine before reading the other thread is; occasionally at idle.. sounds like someone is under the hood rattling a wooden box of bolts...

as far as the shifter wobble.. a non-issue.. that stick is directly connected to the transmission... unlike a front wheel drive vehicle.. where the shifter is linked via a cable [much like our transfer cases]

I've noticed "chunkiness" when shifting into 3rd.. but have learned that slow into 3rd and all's gravy. i will have the dealer check the fluid level at next service. otherwise.. i think the tranny does a fine job.. just wish reverse was locked out while moving forward.. but haven;t done that in quite some time.
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Old 08-08-2012, 07:43 AM   #25
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mine is also clunky and in the lower gears i get a diesel engine like sound. Im also getting a low tone rattle from inside the trans in all but 5th amd 6th. It has gotten better with miles. Im up to about 800. My main gripe is the difficulty in rev matching on downshifts due to the throttle lag. Also the 2nd gear snychro feels pretty bad.Still love it though. I drove my 200sx for the first time since i got my jeep and the shifting felt like a knife through butter. The 200 even has a bad 2nd gear snychro and it was still smoother than the wrangler lol.
Good on you...I have no idea how you manage to rev match your down shifts...I cannot even get my foot on both gas and brake at the same time, let alone try and rev match...I just try to be gentle.
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Old 08-08-2012, 09:27 AM   #26
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my 96 f150 shifts smoother than my 2012 jk sport. ive always wanted a wrangler and this is my first one, but when after only 2000 miles i had to have my trans rebuilt because 5th gear went out i was only a little pissed, and it hasnt shifted quite the same since then.
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Old 08-08-2012, 10:24 PM   #27
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My 2007 JK does the same - gears 1-3 too. Now that I know it's normal.....clunk away.
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Old 02-05-2013, 07:59 PM   #28
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hey guys i only have like 8000 miles on my jk (2012) and i have recently notice a humming noise coming from the engine. i open the hood and took off the engine block cover and noticed that the humming noise is coming from the engine block, but i'm positive thats where the noise is coming from but sounds like it. i was going to ask about the sound of rattle on the shifter (manual) is normal so i guess ill dismiss that oh and also the way it shift from 1-3 i guess lol. main concern now is the freaking humming noise i hear. any suggestions would help thanks. oh and forget about the dealer lol
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Old 02-16-2013, 02:51 AM   #29
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Originally Posted by Potts View Post
Sorry to revive an old thread...




^^^
This for me.

I've got about 600 miles on my 2-dr jk 2012 manual, and just this morning it started rattling quite loudly in gears 1-4 around 2,000 -3,000 RPMs. I had the top down yesterday and cruised all over town and did not hear this. Got in today and on the way to work noticed it. At first I thought I didn't secure the soft top or something, but then soon realized it is coming from the shifter. Definitely a low tone rattle like something is loose.

No popping out of gears or anything like that. Definitely not the normal shaky, bumpy shifter noise or anything like that. I actually like that it shakes and jumps around. This is different and definitely a "new" noise and kind of annoying. Hopefully it's nothing but it's got me worried.

Anybody else have this happen and if so, did you do anything to fix it or find out what is causing it?

Thanks for any help.
This is exactly what mine is doing. Rattle in all gears but 6th between 2,000 and 3,000 rpm. Dealer replaced my input shaft bearing which they noticed was worn. Rattle still there. I'm thinking it may have something to do with outside temp. The colder it is outside the louder the rattle in the t-case shifter. It's really just the most annoying sound. I can't drive around everyday with the top off and radio on to drown it out. If anyone has this and has a fix let me know.
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Old 07-18-2013, 04:17 PM   #30
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To those with the slack, I noticed that I have slack as well but only if I don't keep a throttle to keep the driveline somewhat engaged. If the newer wranglers are drive by wire (sorry don't know if they do) then it would make sense since I think the computer is giving 0 throttle at 0% clutch engagement. With the older systems that use a cable and springs, its a little more forgiving because there is still slack by the time you have shifted and reengaged the clutch.

Now my question, how much "clunking" can these new trannies handle? I would assume a fair amount as it seems to be like a truck tranny? Thanks in advance.

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