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  #37  
Old 06-29-2012, 04:08 PM
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Re: Pentastar vibration at 2000 rpm/60 mph

I have definitely experienced the rhythmic hum/vibration. As discussed on previous posts it only seems to happen on uphill grades doing highway speeds around 60 mph. I have a '12 Laredo 3.6 w/ 18" wheels and 4500 miles. If anyone gets additional info, I would be happy to hear about it.
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  #38  
Old 07-20-2012, 06:48 AM
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Re: Pentastar vibration at 2000 rpm/60 mph

I am still getting the noise/vibration when going up hills at around 55. I was hoping some more people had got some better answers/solutions. I may let the dealership look at it in a couple of weeks when I get some time off but I really don't think that they will be able to figure it out and just throw parts at it. Its not a huge deal if it is something that don't hurt the engine and most people in the vehicle don't even notice it but I sure do. It definitely is not the wheel/tire combo becuase most who have mentioned it on here have the Limited or Overland and I've got the Laredo (4wd) with 17 inch rims and have the vibration problem.
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  #39  
Old 07-21-2012, 07:49 PM
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Re: Pentastar vibration at 2000 rpm/60 mph

I have the overland.. first 3,000 miles.. no vibrations.. 'perfect'. then I rotated the tires front to back.. and I felt wheel vibration 60-70.. shook the steering wheel pretty good I could see my hand shake.. at 6,000 miles I'm like I'm going to swap it back anyway.. back to front etc.. oddly, the wheel vibration is gone.. possible it needed to round a little? (or wear some) It's fine now and just as I'm about to rotate them back. - only other thing I did different was remove the wheel locks from jeep- The new car vanity is over.. and it they steal em.. who cares... I'm trading for a CRD 2014! (btw- removing the locks didnt stop the vibration, seems it wore itself in..)

FYI I'm wicked detailed, and I use a tire depth gauge to measure almost monthly-- to ensure I don't have abnormal wear from a bad toe or alignment.
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Old 07-24-2012, 02:54 PM
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Re: Pentastar vibration at 2000 rpm/60 mph

Mine went to the garage last week after I took the mechanic to a ride on the highway to hear the sound. It was really hard to bring that sound out when he was with me - Murphys law!!!
Anyway he liftet the car and checked for some loose parts without success, he was accelerating the car to around 60mph while on the lift but the sound could not be heard. This is interesting since this probably means this is some combination of speed, acceleration, road maybe also friction of tires that could not be imitated on the lift!.
Paid 50 USD for the inspection and got my car back without a clue.

Laredo 3.6 70 ann. with 20" rims 2011, 14000 miles
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Old 07-29-2012, 09:44 PM
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Re: Pentastar vibration at 2000 rpm/60 mph

Same problem here and it drives me nuts. Dealer said its normal, I disagree.
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  #42  
Old 07-30-2012, 05:32 AM
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Re: Pentastar vibration at 2000 rpm/60 mph

It is not normal and that is the dealers way of saying "I can't fix your vehicle or I don't really care, just make sure you keep bringing it in for more oil changes".
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Old 07-30-2012, 09:41 AM
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Re: Pentastar vibration at 2000 rpm/60 mph

Mine is at the dealership right now for the 2nd time for this concern. Last time they reprogrammed the computer for a TSB that was no way related to what I told them my concern was. I have very little confidence in my dealer. I used to be a Ford certified tech and was even a service manager for 1 year. If we couldn't duplicate the customers concern we asked them to go for a ride with us. When I offered to take them for a ride in my GC the last time the service advisor literally laughed at me. My guess is a bad axle or as mentioned maybe something to do with the front drive shaft. I thought maybe a bad mount, but that seems less likely as I don't think this is a normal "characteristic" of the engine. I am hoping it is not a transmission concern. It definitely takes a combination of speed/load to make it happen. I can make mine do it by hitting 60 mph up a grade and shifting to 4th gear. Every time that scenario happens I get the vibration.
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Old 07-30-2012, 03:11 PM
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Re: Pentastar vibration at 2000 rpm/60 mph

Quote:
Originally Posted by tnjeep View Post
It is not normal and that is the dealers way of saying "I can't fix your vehicle or I don't really care, just make sure you keep bringing it in for more oil changes".

Well my dealer said "we hear it, but can't figure out what it is. You have lots of time on your powertrain warranty so just drive it for a while and see if it gets worse or we'll see if Jeep issues some sort of TSB."


On another forum I read a post that stated "FYI, there is a very recent TSB (issued February 24 I think) about drone noises at high speeds; the TSB tells the dealer to put the vehicle in some sort of mode (done by hooking it up to their computer) which basically let's you drive the vehicle while the four wheel drive is disabled. If the noise goes away while in this safety mode, the TSB tells the dealer to REPLACE the front prop shaft. Unfortunately, this TSB did not fix my vehicle's drone (it still made noise in safety mode)."

I can not find the aboves tsb. Someone earlier in this post said a front drive shaft fixed their problem. Can anybody confirm this tsb or that a front drive shat actually fixed theirs?
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  #45  
Old 08-16-2012, 09:11 PM
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Re: Pentastar vibration at 2000 rpm/60 mph

Woooom.....woooom.....woooom......woooom. Mine does it too. On an uphill grade around 60 mph with enough throttle to maintain speed. 2012 Laredo V6. Only 800 miles on it and it's done it since i got it.
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  #46  
Old 08-25-2012, 09:04 AM
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Re: Pentastar vibration at 2000 rpm/60 mph

jasonl:"My guess is a bad axle or as mentioned maybe something to do with the front drive shaft. I thought maybe a bad mount, but that seems less likely as I don't think this is a normal "characteristic" of the engine."

this is off topic but I had some problems with my 2010 WK and every time I took it in for something they said "it's a "characteristic" of the vehicle". I think this is Chryslers way of saying 'FU' we have your $40,000 now buzz off lol.
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Old 08-30-2012, 12:11 PM
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Re: Pentastar vibration at 2000 rpm/60 mph

Ugh. I've had this as well since getting my vehicle in March. Poked around the forum on this back then and became suitably depressed. Stayed away since then hoping there was a magic fix coming from somewhere - sorry to see it's not so.

Do all WK2s with the 3.6 have this 'characteristic' issue? Or is it just a portion? Anyone have a vehicle that doesn't have this characteristic?
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  #48  
Old 09-06-2012, 06:36 AM
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I'm experiencing the exact same problem
I've taken this up with Chrysler and the dealership.. This, IMO, is unacceptable quality issue which Chrysler should immediately address. I've had the JGC 12 only for a month and the car has already been in the workshop for almost a week and still this problem is not resolved...
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