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Old 08-07-2015, 11:18 PM
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Exclamation Been trying to track down vibration for months! HELP!

05 WK 5.7 ,limited AWD. 73,000 miles.

I have been trying to track down a vibration for months and I am stumped and do not want to keep throwing money at things and guessing in the dark on fixing it so I was hoping someone here knows what is going on and can point me in the right direction.

So a couple of months ago we took our jeep on vacation,we drove from MI to NC and back...no issues with vibrations or anything.... When we got back I had a new set of tires installed. all was fine. Then a couple weeks after I noticed while driving it that from 55-75 there was a vibration ...you could feel it throughout the entire Jeep (floor,center console,rear view mirror was shaking) and it sounded like a helicopter was constantly flying over the jeep with a buffeting noise that coincided with the vibration. There was not however any shake in the steering wheel.

I figured maybe a rear tire got out of balance or something, took it in and had it rebalanced and they said it was out of balance. off we went. Same problem still there. brought it back a few days later and re balanced again. same problem was STILL there. Brought it back the next day...they said it was still slightly out of balance so they balanced it again. Left and it was still doing it so immediately turned around. Belle tire suspected a faulty tire. so they ordered me a completely different set of 4 tires (different brand even). installed and balanced. They also said they did not see evidence of any bent wheels. I then took the jeep to another shop and had them rebalanced by a family member just to make sure they were balanced with the proper tools (read that the chrome clad wheels can be tricky to balance) so they did and they said the balance was good.

The vibration improved slightly but was still there. By this point I was convinced the tires were not to blame obviously. So I started digging deeper. Front end is all up to par,ball joints are good,tie rods,sway bar bushings,end links,no play in the steering wheel or anything,struts are good. I did notice some play in the drivers side front cv axle. so I decided to replace that. upon removal it did not look or feel horribly worn but it was original so I replaced it anyhow.

while the shaft was out I noted that the output coupler on the differential did have SOME play (left,right,up,down...etc...) by about 1/16"-1/8" maybe?...not sure if this is normal?. otherwise everything else checked out.I also checked for play in the wheel bearings and got no movement out of them and they spun free with no hang ups or funny noises.

When on the highway I can manually bump the shifter down and up through gears and no change in vibration. I can turn traction control and tow haul mode on and off and there is no difference. I can throw it in neutral and the vibration still persists. The vibration does not get worse or better when making abrupt left or right hand maneuvers like you might find with a wheel bearing. it stays constant at highway speeds. below 55 mph you cant feel it and above 75 mph the vibration seems to tapper off slightly but is still indeed there. All of the fluids are within spec and clean. Transmission shifts great through all of the gears.

I would also like to mention that when we bought the jeep over a year ago that there was a growling noise coming from the front end. we made the dealer fix it before we purchased the Jeep. I was there and watched them install and entirely new "reman unit" front differential assembley (they said there was internal damage and the parts to fix it were unavailable to them and that is why they had to install the entire unit as a whole).(also being it was a new unit it did come with new mount bushing and so forth). They also at which point installed a new passenger side front cv axle while they were there.

As of recently I have noticed I can now slightly feel the vibration in the steering wheel aswell. Like riding over a continuous shallow rumble strip driving down the highway.

After they replaced it the majority of the humming noise had disappeared but it was still slightly there. That noise is still present and slightly louder than it was back then. you mostly hear it at highway speeds when tipping in and out of the throttle (almost like a pinion bearing or something). Not sure if that is related in anyway or not but I just wanted to make mention of it.

I am just at wits end. Tried most everything I could think of without going to crazy and throwing a ton of parts and money at it that I can't keep affording to do. It is my wifes Jeep and our children ride in it and I need to make sure it is safe and we dont have to worry about it so I need to get this taken care of once and for all.

The only thing I have yet to do that I can think of would be to try and remove the front drive shaft and drive it and see if the issue remains and see if maybe its somehow related to the cv in the drive shaft (had a similar issue on a 2000 grand cherokee we use to have...just not vibrations so much as noise).I am not sure if it is even possible to drive a wk without the front drive shaft though which is why I have yet to attempt it (didnt know if it would throw computer codes or something....never know with the newer stuff thats so intertwined with computerized mumbo jumbo lol).

I apologize for such a long thread , I just wanted to try and put as much info as I could out there so you guys can spend less time asking me questions and more time understanding what the issue is from the get go. Thank you in advance for the help guys!!!

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Old 08-08-2015, 12:42 PM
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Re: Been trying to track down vibration for months! HELP!

Hi mate, firstly sorry to hear of your dilemma. I am also experiencing very similar symptoms. I replaced my front hub assemblies about 2 months ago and since then I have had a very annoying groaning/humming vibration right across the the forward cross beam. I have replaced : 2 x wishbones, ball joints, sway bar bush' brake pads and discs all round, turbo resonator, 2 x Goodyear Wrangler tyres, serp belt, transmission support mount, drop links, diff fluid and disco danced all four wheels all over the truck. I have checked for play in the CV shafts but there is ver little movement. I am absolutely furious, I do not have a clue???? I have made a bid on a couple of used hubs on eBay to see if I bought shit hubs to be begin with!!!! I love the truck but I can't afford to keep this up!!!! I've read numerous web sites looking for possible causes!! My Heep is breaking me. If you do have success please let me know your secret😓😓😓


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Old 08-09-2015, 12:35 AM
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Re: Been trying to track down vibration for months! HELP!

Quote:
Originally Posted by craigyfm View Post
Hi mate, firstly sorry to hear of your dilemma. I am also experiencing very similar symptoms. I replaced my front hub assemblies about 2 months ago and since then I have had a very annoying groaning/humming vibration right across the the forward cross beam. I have replaced : 2 x wishbones, ball joints, sway bar bush' brake pads and discs all round, turbo resonator, 2 x Goodyear Wrangler tyres, serp belt, transmission support mount, drop links, diff fluid and disco danced all four wheels all over the truck. I have checked for play in the CV shafts but there is ver little movement. I am absolutely furious, I do not have a clue???? I have made a bid on a couple of used hubs on eBay to see if I bought shit hubs to be begin with!!!! I love the truck but I can't afford to keep this up!!!! I've read numerous web sites looking for possible causes!! My Heep is breaking me. If you do have success please let me know your secret😓😓😓


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When I find out I will surely share what the fix was.

Hopefully someone here knows what is going on or can point me in the right direction. Im lost on where to go from here.
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Old 08-11-2015, 05:21 AM
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Re: Been trying to track down vibration for months! HELP!

Matey, today has brought and to my vibration woes! As explained I replaced both my front hubs with aftermarket parts. The vibration was terrible right through the whole vehicle.
Yesterday I purchased two OEM parts and installed today. Jeep is back to her best. Feels like riding on glass. 😁. I would advise you to firstly check the torque spec on your hub bolts. They should be 100 Ft Lbs or 135 NM. If there's no improvement then replace your hubs. Try and use OEM or failing that certified used parts from a breaker. Good luck mate, trust me when I say that I feel your pain!!!!😳


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Old 08-11-2015, 07:25 AM
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Re: Been trying to track down vibration for months! HELP!

Not that familiar on the WK, but i believe i did see an other thread about vibration, which finally was solved by changing the prop shaft. Seems that lack of lubrication had something to do to it.
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Old 08-11-2015, 12:28 PM
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Re: Been trying to track down vibration for months! HELP!

Check to make sure the front prop shaft and the rear drive shaft still have all their balance weights attached. Look for any leaking or sprayed grease patterns around the universal joints. I'm thinking dry joints could induce a vibration.
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