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Old 12-13-2016, 08:02 AM
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2012 JK Driveline noise

Hey all,

New Jeep owner here... just bought a 2012 Wrangler 2door sport. 6spd.
It has 19k miles (very low for the year) and is still covered under the powertrain warranty...

My issue is that when I get up to 50+ there starts a whine in the driveline, best I can tell at the rear of the transmission... it gets priogressively louder as I approach 60, and by 70 its unbearable, but at 60 its makes the worse type of sound to the whine, almost like a grinding noise, but still loudest at 70. The pitch changes when I accel/decel... but doesn't matter what gear i'm in (5,6). It is ridiculously loud to the point that not even the radio drowns it out... i mean LOUD. (and it is definitely NOT tire noise i know the difference).

It had 18k miles on it when I bought it, and the front drive shaft blew apart within the first week...

It has a 2" lift, and is running 35's on 15" rims, has aftermarket stabilizers and front sway bar links. The front drive shaft I had replaced with the U-Joint type (had the cv joint type on it). The main driveshaft is still the CV joint type..
The dealer is refusing to even look at it because they say its been modded, and I find it hard to believe that a 2" lift can be causing so many driveline issues.. they sell them from Jeep.

My questions are:
1. Anyone know of a dealer in the Tampa bay area that they have had decent luck with the service dept? Courtesy group refuses to work on it, period, and has banned me from their dealerships for raising a stink about them not covering the front driveshaft under warranty. Dayton Andrews wants to charge me 136.00 to check it out before they will even tell me if its warranty or not.
2. Is this a common problem?
3. Do you think its the main driveshaft, or the transmission?
4. Any other suggestions to get it fixed? (I am BROKE at the moment).

My concern is, I commute to work every day with this going 70 on the highway... and I dont want the damn thing to blow apart and cause other damage.

Thanks for any feedback.
Eric

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Old 12-13-2016, 11:15 AM   #2
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Rear driveshaft? Exhaust? Differential? A belt somewhere? Is the suspension properly torqued, are the bushings in suspension and track bar in good shape? What kind of lift do you know?

Does it affect actual driving (is still tracks true etc)? Does it affect shifting - ie why suspect the transmission? If the main complaint is noise probably not tires, axle shafts or balljoints, but worth inspecting them nonetheless with larger tires.

I would look at rear driveshaft and exhaust probably first. See what others have to say.

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Old 12-13-2016, 02:26 PM
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Originally Posted by mommymallcrawler View Post
Rear driveshaft?
Exhaust?
Differential?
A belt somewhere?
Possibly, No, No, No

Quote:
Originally Posted by mommymallcrawler View Post
Is the suspension properly torqued, are the bushings in suspension and track bar in good shape? What kind of lift do you know?
As far as I know yes, Yes its all in excellent shape, it barely has any miles/wear. Its a suspension lift, I do not know the brand, or exact height... its a 2 or 2.5

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Originally Posted by mommymallcrawler View Post
Does it affect actual driving (is still tracks true etc)? Does it affect shifting - ie why suspect the transmission? If the main complaint is noise probably not tires, axle shafts or balljoints, but worth inspecting them nonetheless with larger tires.

I would look at rear driveshaft and exhaust probably first. See what others have to say.
Drives fine, Steers fine, shifts fine.... I am more worried about a repeat... meaning the Front Driveshaft came apart on the highway, and blew transmission fluid all over when it came out, I don't want the rear one to do the same. Was mostly curious if anyone had similar symptoms.

and OK, I will look into it... still trying to find a dealer to take it to before the end of the month before the powertrain warranty runs out.

Thanks for the feedback though!!
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Old 12-13-2016, 02:37 PM   #4
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Sounds like rear pinion to me.Had the same issue on my 14 jku. Changed pinion seal and bearing. and got a new rear drive shaft. Fixed the issue. Is it louder when under torque? Sound was always there but was louder under torque. Faster I went the louder it got. Hope this helps. I diagnosed mine by having a buddy drive my jeep while i laid in the back to see where it was coming from.
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Old 12-14-2016, 04:48 PM   #5
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Also if you got it used i would change the rear and front diff oil and transfer case fluid.
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Old 12-15-2016, 09:44 AM
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Sounds like rear pinion to me.Had the same issue on my 14 jku. Changed pinion seal and bearing. and got a new rear drive shaft. Fixed the issue. Is it louder when under torque? Sound was always there but was louder under torque. Faster I went the louder it got. Hope this helps. I diagnosed mine by having a buddy drive my jeep while i laid in the back to see where it was coming from.
Noise is loudest while maintaining speed around 60-70mph. Noise changes with Acceleration/deceleration. I'm leaning towards a bearing, but gotta find which one.
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Old 12-15-2016, 09:45 AM
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Also if you got it used i would change the rear and front diff oil and transfer case fluid.
Thanks, Plan on it... it's just very troublesome because it only has 20k miles on it... that's hardly any mileage at all.
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Old 12-15-2016, 01:03 PM   #8
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Thanks, Plan on it... it's just very troublesome because it only has 20k miles on it... that's hardly any mileage at all.
ya but its a 2012 so the fluids have been sitting a lot. Jeeps/cars/trucks are meant to be driven!

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