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Old 02-03-2015, 10:54 PM
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Brand new jeep clunking between gears???

Hey guys. So Just yesterday i drove home my brand spanking new 2015 jeep wrangler unlimited sahara (6 speed manual). and since ive taken it home i notice/feel a faint clunking noise between gears no matter how smooth i am... so far some people have been saying its normal and others saying its not... so I decided to take matters into my own hands and ask you guys! What do yall think? Normal or did i just drop tons of money on a god damn LEMON

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Old 02-03-2015, 10:57 PM   #2
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Go to a couple other dealers and drive some Jeeps and get a better idea.....one persons's clunky is another persons normal........

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Old 02-03-2015, 11:09 PM
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Haha my wallet doesnt exactly approve of my relationship with dealerships... haha so i tend to avoid.. But the noise can be felt right through the shift rod right up to the knob. Now from my research ppl are saying "Normal jeep driveline slack" Can anyone confirm? The damn thing doesnt even have 60 miles yet!
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Old 02-03-2015, 11:36 PM
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nothing guys???
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Old 02-04-2015, 12:31 AM   #5
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I have a '14 JKU Sport, 6 speed manual and it is by far the nosiest and the clunkiest transmission I have ever had, and I've had quite a few vehicles with standard transmissions. Took me some time to get used to it and now my shifts are smooth, well most of the times....also wranglers are known to come out of the factory low on transmission fluid (not all the times, bit it does happen often enough) so check it
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Old 02-04-2015, 12:40 AM
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Thanks for the heads up Ruski! Ill be sure to check that out before i head off to work in the morning. Interesting about it being a naturally clunky tranny though. You would think with the growing popularity of these things they would work out some of the bugs in the newer years... i guess its justt a "jeep thing"
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Old 02-04-2015, 12:44 AM   #7
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True story.....Don't get me wrong, even though the transmission is noisy once you get used to it it's a very enjoyable ride
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Old 02-04-2015, 12:47 AM
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yah man the waiting list down here at some dealerships were 7 months! Chrysler is making a killing! And oh yah no doubt... no other complaints at all besides the clunk (which now i know is normal) But then again shes only got 63miles on her... haha so well see what else it decides to throw my way going forward
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Old 02-04-2015, 01:16 AM   #9
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Keep in mind that this transmission is connected to a transfer case and another axle, so there is a lot more stuff there to clunk! Remember that it is more like a truck than a car, too, and that it will NEVER be as smooth as "regular" cars. A Jeep is not purpose built to be a smooth street car...instead it is designed to be excellent at off roading on logging roads, over trails like the Rubicon Trail or Moab, Utah, so it has to be built tough. Mine sounds and feels a little clunky and I know what you're talking about. Nothing to worry about, but agree with a previous poster who said to go drive a couple of others to ease your mind.
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Old 02-04-2015, 01:24 AM
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Thanks foolproof! Always good to hear that everything you thought was an issue just turns out to be normal, a buddy of mines brother has a manual 13 jku. So next time i see him ill be sure to take it for a spin and put my worrying mind at ease
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Old 02-04-2015, 08:42 AM   #11
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I'm just reached 25,000 miles on mine, I like the truck feel of it, makes it a more unique experience, no problem with it and provides an enjoyable ride.
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Old 02-04-2015, 08:51 AM   #12
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nothing guys???
Check the oil level in the tranny, there known to be low right from the factory...
Don't know if that would make a difference though..........
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Old 02-04-2015, 11:43 AM   #13
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All of the JK manuals will clunk under any given circumstances, some more, some less. Try keeping the RPM's up when you shift and it will clunk less.
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Old 02-04-2015, 11:50 AM   #14
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Nothing could be finer than cluncking in Carolina
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Old 02-04-2015, 12:01 PM   #15
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Keep in mind too that the Jeep is body on frame. So you're sitting in the cab while your transmission and shifter are attached to the driveline/frame. My shifter vibrates and knocks around a bit while driving just because of that. I wouldn't describe it as a "clunk" though, so I'm not sure we're experiencing the same thing.
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Old 02-04-2015, 01:34 PM   #16
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A common issue. I have the same clunking when shifting at low RPMs since day one. There is a lot of slop in the drive line. Try shifting at 4,000 RPM or above, there will be no clunk. Rotational inertia seems to help.

If you want to really hear it clunking, crawl downhill in 1st gear in low range. Every time the drive line loads/unloads going over a rock, it will clunk. Just the way these things are built (sloppy).

Interestingly, I had a 2000 TJ and it was butter smooth. So Jeep knew how to build these in the past.
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Old 02-05-2015, 12:09 AM   #17
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Same thing, noticeable clunking since day one. Just make the music louder. That's what I do.

Even though, this gearbox is a little noisy, it's very tough as it was designed and is being used in commercial vehicles 2x heavier than our JKs and JKUs.
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Old 09-22-2015, 01:32 PM   #18
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JKS '15 here

Yea, I noticed the same; came from 1999 F-150 Manual -- comparably stiff drive-train.

I can appreciate behavior of the Jeep in this way because it's made me to get to know the vehicle... ... right down to the gear ratios.

To be honest, had to get real "intimate" with clutch release point to avoid the "clunk & jerk". Although, high RPMs work well, also.

Which method I choose depends on how I feel about gas-mileage on that particular day. I alternate between the two about 50/50 at this point.

Also, it only seems to be present in gears 1-3 for me. Sound about right... ?

Maybe a result of the torque-y gear ratios paired with the looser drive-train... ?

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If you want to really hear it clunking, crawl downhill in 1st gear in low range.
Exactly this, patreb!
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Old 09-22-2015, 02:19 PM   #19
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Keep in mind that this transmission is connected to a transfer case and another axle, so there is a lot more stuff there to clunk! Remember that it is more like a truck than a car, too, and that it will NEVER be as smooth as "regular" cars. A Jeep is not purpose built to be a smooth street car...instead it is designed to be excellent at off roading on logging roads, over trails like the Rubicon Trail or Moab, Utah, so it has to be built tough. Mine sounds and feels a little clunky and I know what you're talking about. Nothing to worry about, but agree with a previous poster who said to go drive a couple of others to ease your mind.
My '14 JKU auto is very smooth, as smooth a regular car. It is the manual transmission not the rest of the Jeep that clunky and noisy.
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Old 09-22-2015, 02:33 PM   #20
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This sounds normal. I drove a 6 speed on a test drive and it clunked. I have had a 1993, 1998 and now a 2012 JKU auto. 93 and 98 were 5-speeds and clunked.

I love having the automatic and the ability to lock in a gear if needed.

You are good to go my friend.
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Old 09-22-2015, 05:27 PM   #21
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This brings back memories of folks complaining about the T56 in a supercharged mustang being clunky. I guess folks are used to different things.
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Old 09-22-2015, 07:55 PM   #22
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A common issue. I have the same clunking when shifting at low RPMs since day one. There is a lot of slop in the drive line. Try shifting at 4,000 RPM or above, there will be no clunk. Rotational inertia seems to help. If you want to really hear it clunking, crawl downhill in 1st gear in low range. Every time the drive line loads/unloads going over a rock, it will clunk. Just the way these things are built (sloppy). Interestingly, I had a 2000 TJ and it was butter smooth. So Jeep knew how to build these in the past.
I've had a identical experience. My 04 was very quiet.
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Old 09-22-2015, 10:35 PM   #23
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Check the oil level in the tranny, there known to be low right from the factory... Don't know if that would make a difference though..........
I also have a 6 speed and this is great advice. You'd be surprised at how many other people have reported that theirs was low from factory. You'll have to buy or make a specialty wrench to check it yourself or have the dealership to it.
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Old 09-24-2015, 06:34 PM   #24
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I also have a 6 speed and this is great advice. You'd be surprised at how many other people have reported that theirs was low from factory. You'll have to buy or make a specialty wrench to check it yourself or have the dealership to it.
That's just to drain it lol. To fill it, or check it you just need a regular Allen, 17mm i think?? can't remember. Fill plug super easy to get to. Drain plug, you are right.
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Old 09-24-2015, 08:32 PM   #25
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I have a '14 JKU Sport, 6 speed manual and it is by far the nosiest and the clunkiest transmission I have ever had, and I've had quite a few vehicles with standard transmissions.
Totally agree, I had a brand new transmission and clutch put in my 07, it's a 6 speed manual, worst clutch ever, Jeep clutches suck, they just do. I drive our Honda CRV 5 speed stick and it's like butter.
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Old 09-24-2015, 10:19 PM   #26
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That's just to drain it lol. To fill it, or check it you just need a regular Allen, 17mm i think?? can't remember. Fill plug super easy to get to. Drain plug, you are right.
Yes, you're right :-( my brain is all over the place lately....
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Old 09-25-2015, 01:12 AM   #27
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I have a 13 sport 6 spd. Its really smooth for a Jeep. Are you trying to float the tranny? That would make shifting rough.
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Old 09-25-2015, 06:51 PM   #28
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Does anyone think that the looseness could be intentional?

Or is that out of the question?
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Old 10-02-2015, 06:34 PM   #29
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Yes, you're right :-( my brain is all over the place lately....
it's okay mine too.
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Old 10-02-2015, 07:18 PM   #30
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Does anyone think that the looseness could be intentional? Or is that out of the question?
I could see for cost the tolerances aren't tight as possible. I do think in this day and age that they could have done better with the clutch assembly and synchros. It does get irritating when it doesn't want to go in reverse and either makes a nasty noise or I have to bump the vehicle forward a foot for everything inside to line up to shift. Though I would think the slop would add to wear but these transmissions seem to last so who knows.

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