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Old 11-07-2018, 06:03 PM
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Clunking in rear end when accelerating?

I have a 2016 Sahara and it's been making a clunking noise in the rear end (I think the drivers side). It happens after hitting the break and then accelerating. Within seconds of acceleration "clunk".

I have taken it to the dealership several times now and they say they can't duplicate the problem which seems odd because it happens most of the time. At one point, they told me that dirt build up was probably the cause, that the break was probably sticking. I've been powerwashing the break area regularly now and it might be happening less, but is still happening.

Any thoughts/suggestions?

It's also currently at the dealership right now because the check engine light came on (on and off), when I would shift from park to drive it would almost jump and then it wouldn't want to upshift and I couldn't get over 30mph. It would happen for a few minutes and then be fine. They are saying they think it's corroded wires in the transmission.

Anybody experience this with a newer vehicle?

I've only had the vehicle about 5 months and am getting a little frustrated with the issues it's had (there's a few more than what I listed)

Please help!

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Old 11-07-2018, 06:21 PM   #2
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Have you looked in on your jack? If it is not tightly expanded in its enclosure, things can wiggle a bit. FYI. It is located inside the rear cargo area just inside the tailgate door.
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Old 11-07-2018, 06:22 PM   #3
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How many miles on it?

My first thought is a cv joint.

The dirt sounds like complete b.s., so does the corroded wires.
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Old 11-07-2018, 06:44 PM
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I'll check the jack when I get it back thanks! And that's what's I was thinking about the corroded wires also. I'm thinking about taking it a different service provider.
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Old 11-07-2018, 06:45 PM
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And 40,000 miles
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Old 11-07-2018, 07:33 PM   #6
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My 2016 makes a clank when I take off from a stop also. I am also at 40000 miles. I suspected my receiver was the sound, so I removed it from the hitch, but still hear it. I will have to check the jack.
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Old 11-07-2018, 08:01 PM   #7
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Mines much older, but turned out to be the driveshaft. Replaced with a JEReel 1310, and all good.

May not be the issue, but checking the DS is a good idea. I could slightly twist the two separate halves by hand in opposite directions when under there. There should be no play in it.


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Old 11-07-2018, 08:12 PM   #8
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I'd check the jack, the U-joints, the brake caliper slide pins, and make sure the brake pads aren't binding in the caliper. Checking that the emergency brake isn't binding might be a good idea as well.
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Old 11-07-2018, 08:48 PM   #9
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My clunk was coming from the diff. A few chipped teeth and tolerance problems. 2015 with 20k at the time
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Old 11-08-2018, 01:14 PM   #10
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Old 11-08-2018, 01:21 PM   #11
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The corroded wires stinks of BS, but check the jack. My clunk was just me learning to drive a stick shift, but you're in an auto so that won't be your issue.
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Old 11-08-2018, 01:30 PM   #12
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My 2013 had same issue. If I'd reversed, stopped, then starting forward, I'd get a very loud and noticeable one-time clunk. Checked everything, jack, suspension bolts, U-Joints, brakes, brake clips, etc., etc. Searched and searched online and never found anything. Lo and behold, after my last differential servicing (I do them all myself), the issue disappeared. I pulled the pumpkin on the rear and didn't find anything at all out of the ordinary with regard to sediment, shavings, pieces of metal teeth, etc., but since that servicing (about 20k miles ago), I haven't had the sound rear it's head once.

I have/had LSD, and I always use the mopar graphite additive with every diff service. I suspect that the LSD has finally worn fully away and that perhaps between the sediment, etc., of that getting fully flushed out and the new gear oil, whatever was causing the noise is no longer an issue.

Wish I could give you something more definitive than this explanation. I'm the type of person that likes to see or find the actual cause to an effect beyond a doubt, so it's mostly speculation, but change out your differential fluid and see if it resolves your problem.
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Old 11-09-2018, 12:11 AM   #13
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My clunk was coming from the diff. A few chipped teeth and tolerance problems. 2015 with 20k at the time


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Old 11-09-2018, 05:10 AM   #14
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My 2016 has been doing the same thing since they replaced the transmission back in February of this year. 90% of the time coming from a stop and at times when going from park to drive...clunk. Not so much from park to reverse. Wondering how much play should be in the drive shaft. Seems louder going into drive from park then any other gear. The dealer says they can not hear it. I am getting ready for state inspection, at that time I will have the independent look at it. For I have not much faith in dealer service techs.
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Old 11-09-2018, 03:45 PM   #15
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Originally Posted by ckendra38 View Post
I have a 2016 Sahara and it's been making a clunking noise in the rear end (I think the drivers side). It happens after hitting the break and then accelerating. Within seconds of acceleration "clunk".

I have taken it to the dealership several times now and they say they can't duplicate the problem which seems odd because it happens most of the time. At one point, they told me that dirt build up was probably the cause, that the break was probably sticking. I've been powerwashing the break area regularly now and it might be happening less, but is still happening.

Any thoughts/suggestions?

It's also currently at the dealership right now because the check engine light came on (on and off), when I would shift from park to drive it would almost jump and then it wouldn't want to upshift and I couldn't get over 30mph. It would happen for a few minutes and then be fine. They are saying they think it's corroded wires in the transmission.

Anybody experience this with a newer vehicle?

I've only had the vehicle about 5 months and am getting a little frustrated with the issues it's had (there's a few more than what I listed)

Please help!
Hi ckendra38,

I am saddened to hear that you have this concern with your Jeep Wrangler. If you would like an additional layer of assistance while your Jeep is in service, please feel free to send us a private message.

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Old 11-09-2018, 08:36 PM   #16
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I had a clunk in the rear when going over bumps or speed bumps. It happened to be my rear, lower shocks bolts. I did change my shocks out and I guess I didn’t tighten them enough. Give that a check perhaps. I believe you will need an 18mm socket and wrench.
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Old 07-16-2019, 08:55 AM   #17
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I've been searching for an answer to this and have found many threads about the problem, but have yet to find one where the OP comes back to say "Fixed it, the problem was..."

Has anyone solved their issue? I'm going to mention to the tech to maybe change the diff fluid when I bring it Thursday to see if that is it.

My 2016 JK Unlimited Willys is having an issue that sounds like the above posts. From a dead stop, starting to accelerate, a tapping noise from the back driver's side it sounds like. Most of the times it's one tap, sometimes it's two quick taps.

I've checked the jack and it's secure. I brought it to the service center, and after keeping it for a day and a half they said it was a cracked spare tire carrier. They replaced that and said all was good. Nope. The spare is solid and makes no sounds when jiggled.

Thanks, and sorry if this is beating a dead horse, but I figured I'd ask.
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Old 07-17-2019, 06:53 AM   #18
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Did you happen to check and see if the rear shock absorbers are tightened enough? Head on back and below the Jeep and see if there is play in the bottom end of the absorber when you move it up and down. If it moves, even just a little bit, that can produce a clunking noise when the car is in motion. This had happened to me anytime I went over a speed bump. Just a thought to check!
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Old 07-17-2019, 12:10 PM   #19
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Originally Posted by BCald7 View Post
I've been searching for an answer to this and have found many threads about the problem, but have yet to find one where the OP comes back to say "Fixed it, the problem was..."

Has anyone solved their issue? I'm going to mention to the tech to maybe change the diff fluid when I bring it Thursday to see if that is it.

My 2016 JK Unlimited Willys is having an issue that sounds like the above posts. From a dead stop, starting to accelerate, a tapping noise from the back driver's side it sounds like. Most of the times it's one tap, sometimes it's two quick taps.

I've checked the jack and it's secure. I brought it to the service center, and after keeping it for a day and a half they said it was a cracked spare tire carrier. They replaced that and said all was good. Nope. The spare is solid and makes no sounds when jiggled.

Thanks, and sorry if this is beating a dead horse, but I figured I'd ask.
Hi BCald7,

Sorry to hear of the concern you are currently experiencing. Please let us know via private message if you decide to have your dealer look into this. We would like to have this documented and have a case escalated in your behalf so a Case Specialist can work with your dealer to help find a potential solution.

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Old 07-17-2019, 01:27 PM   #20
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It may have been a coincidence, but when I had the same thing I took my Jeep in and I had a bunch of chipped gears in the differential. They also tightened my rear control arms as they didn't like the look of the bolts for some reason. The sound went away but now has come back. so I'm going to check control arms again and if that doesn't work re-inspect the differential again. It seems that these Jeeps have a problem with those chipped teeth even with normal driving.
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Old 07-17-2019, 01:38 PM   #21
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Please help!

I too have searched and come across the many threads of this or similar issue. I need to find time to get underneath and start by re-torquing my suspension parts I guess, see if that does anything. So in this case I'd be looking at what? CA bolts, shock bolts, anything else?

Also, as some threads have stated, the "clunk" or "pop" seems to only occur once the vehicle is "warmed up" so to speak (IE driven a bit). Like in my case, when I leave work, I don't get the pop, and then after a 25 minute highway drive home I start getting the pops in the last stretch of the drive (once I'm off the highway and back into stop and go driving; taking off from the off ramp, multiple stops and gos on the side streets, etc). This had me worried that it is something more (serious?) like driveshaft, u-joints, diff, something like that.

HOWEVER, now it seems like I am getting the pops with less "warming up" per se. I can just do like a 10 minute drive to grab some lunch, and on the way back I'll be getting lighter pops. So I'm hoping again that it's just loose suspension components. Guess I need to make time to check it, driving 40 miles a day highway, 5 days a week..........

Any additional insight would be appreciated, as the extent of my vehicle work is oil changes and brake jobs

Worst case scenario, if it is something major (diff issues, etc) I do have lifetime powertrain warranty available.

Thanks
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Old 07-17-2019, 02:05 PM   #22
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Same issue here. 90K miles, manual 2015. Usually happens when accelerating from a stop and figured it was just something I needed to get used to.
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Old 07-17-2019, 04:37 PM   #23
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I too have searched and come across the many threads of this or similar issue. I need to find time to get underneath and start by re-torquing my suspension parts I guess, see if that does anything. So in this case I'd be looking at what? CA bolts, shock bolts, anything else?

Also, as some threads have stated, the "clunk" or "pop" seems to only occur once the vehicle is "warmed up" so to speak (IE driven a bit). Like in my case, when I leave work, I don't get the pop, and then after a 25 minute highway drive home I start getting the pops in the last stretch of the drive (once I'm off the highway and back into stop and go driving; taking off from the off ramp, multiple stops and gos on the side streets, etc). This had me worried that it is something more (serious?) like driveshaft, u-joints, diff, something like that.

HOWEVER, now it seems like I am getting the pops with less "warming up" per se. I can just do like a 10 minute drive to grab some lunch, and on the way back I'll be getting lighter pops. So I'm hoping again that it's just loose suspension components. Guess I need to make time to check it, driving 40 miles a day highway, 5 days a week..........

Any additional insight would be appreciated, as the extent of my vehicle work is oil changes and brake jobs

Worst case scenario, if it is something major (diff issues, etc) I do have lifetime powertrain warranty available.

Thanks
I'd be looking for a broken/worn out exhaust hanger. If the sway bar links, track bar, and shocks are tight and it gets worse the warmer the vehicle gets, exhaust might be something to check over thoroughly.
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Old 07-17-2019, 07:57 PM   #24
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I got under the Jeep and everything is tight. But when I move the Jeep back and forth the drive shaft turns a little bit and I can hear a clicking from the transfer case. Is this normal? How much play should there be?
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Old 07-17-2019, 09:53 PM   #25
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Mine does this too. I'm thinking rear gear or cv joint.
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Old 07-18-2019, 06:09 AM   #26
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I too have searched and come across the many threads of this or similar issue. I need to find time to get underneath and start by re-torquing my suspension parts I guess, see if that does anything. So in this case I'd be looking at what? CA bolts, shock bolts, anything else?

Also, as some threads have stated, the "clunk" or "pop" seems to only occur once the vehicle is "warmed up" so to speak (IE driven a bit). Like in my case, when I leave work, I don't get the pop, and then after a 25 minute highway drive home I start getting the pops in the last stretch of the drive (once I'm off the highway and back into stop and go driving; taking off from the off ramp, multiple stops and gos on the side streets, etc). This had me worried that it is something more (serious?) like driveshaft, u-joints, diff, something like that.

HOWEVER, now it seems like I am getting the pops with less "warming up" per se. I can just do like a 10 minute drive to grab some lunch, and on the way back I'll be getting lighter pops. So I'm hoping again that it's just loose suspension components. Guess I need to make time to check it, driving 40 miles a day highway, 5 days a week..........

Any additional insight would be appreciated, as the extent of my vehicle work is oil changes and brake jobs

Worst case scenario, if it is something major (diff issues, etc) I do have lifetime powertrain warranty available.

Thanks
Mine seems to mostly do this after it's warmed up as well. I think that's why the service tech thought the tire carrier replacement did the trick. He didn't hear it from a short ride I guess. I'm hoping it's just a creek in the suspension, but somehow I don't think so. It sounds like something has play in it and catches upon acceleration.

I'm making a list for him to look at from suggestions on this thread. I appreciate the help on this from all of you.

I forgot to mention before that my Jeep only has 22.5K on it and it's an automatic. I've heard people with stick get this too.
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Old 07-18-2019, 06:16 AM   #27
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Hi BCald7,

Sorry to hear of the concern you are currently experiencing. Please let us know via private message if you decide to have your dealer look into this. We would like to have this documented and have a case escalated in your behalf so a Case Specialist can work with your dealer to help find a potential solution.

Mark
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Thank you! I was thinking that would be my next option if they can't solve the issue with today's visit. It seems like this is a fairly common problem. If there's a way you can make a dealership-wide inquiry about similar issues customers bring their car in for? I imagine there are a lot of people out there having the same issue that aren't on this forum, and dealer records could help narrow this down. May be grounds for a recall.

Thanks
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Old 07-18-2019, 06:24 AM   #28
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Same issue here. 90K miles, manual 2015. Usually happens when accelerating from a stop and figured it was just something I needed to get used to.
How long (miles) has it been happening on yours? Has it gotten any louder or worse in that time? Mine has 22.5k miles on it.

If it's something benign I can live with it. With my luck I'll think that, and as soon as my warrantee is up my transmission will blow.
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Old 07-18-2019, 06:45 AM   #29
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Mine is a 2016 with 45000 miles. Itís been doing it for a while


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Old 07-18-2019, 07:46 AM   #30
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How long (miles) has it been happening on yours? Has it gotten any louder or worse in that time? Mine has 22.5k miles on it.

If it's something benign I can live with it. With my luck I'll think that, and as soon as my warrantee is up my transmission will blow.
Mine has stayed the same over time. Probably started with around 22K miles a few years ago. Good luck. Let me know if you're ever able to diagnosis.
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