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Old 05-05-2016, 03:24 PM
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Angry Vibration

Hi
So spring is here and summer tires are now on. Car runs smooth and nice, but I noticed one day when I left home and accelerate hard up to 60-70mph vibrations in steering wheel and seat but after a while it was gone. Drive the same road every day so it is not just the road, Went to work and drove home smooth and nice. Parked for a couple of hours and then went for a ride same vibration for a short while and then smooth. What is this?? It is like if I accelerate hard I get this but if I am gentle on the pedal no vibrations. If a wheel is out of balance it would vibrate all the time at least in the same speed. The vibration is in steering wheel and driver seat. I had a Bmw x5 before this car and never any vibration issue, it also feels like the gas pedal vibrates a little. Spoke to some guys that said in a Jeep you always feel a little drivline and engine vibrations compare to another 4*4 suv. Anyone else with this problem??

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Old 05-06-2016, 07:37 AM
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Re: Vibration

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Originally Posted by Conny View Post
Hi
So spring is here and summer tires are now on. Car runs smooth and nice, but I noticed one day when I left home and accelerate hard up to 60-70mph vibrations in steering wheel and seat but after a while it was gone. Drive the same road every day so it is not just the road, Went to work and drove home smooth and nice. Parked for a couple of hours and then went for a ride same vibration for a short while and then smooth. What is this?? It is like if I accelerate hard I get this but if I am gentle on the pedal no vibrations. If a wheel is out of balance it would vibrate all the time at least in the same speed. The vibration is in steering wheel and driver seat. I had a Bmw x5 before this car and never any vibration issue, it also feels like the gas pedal vibrates a little. Spoke to some guys that said in a Jeep you always feel a little drivline and engine vibrations compare to another 4*4 suv. Anyone else with this problem??


You say that the vibration goes away, after a short while. Does this happen EVERY time the vehicle is parked for a few hours? If so, I'd say that the construction of your tires has them "flat-spotting", in that they get warmed up and pliant, then when you park for an extended time, the portion of the tire that you're parked on gets SLIGHTLY flat. After you drive for a while, the tires warm up again, and go back to being round.....until you park again.

This was very common back in the 60s and 70s, with bias ply tires that had nylon and rayon cords in their construction.
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Old 05-06-2016, 07:45 AM
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I agree, what you are describing sounds exactly like flat spotting. Different makes of tires can have more or less of this.
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Old 05-06-2016, 06:37 PM
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Re: Vibration

Tanks for reply, I have Continental contact sport tires on for now, and I have the vibration issue every time the car been sittning for some hours. I want tires with more heavy pattern and was looking at terra grip nitto. Did not realise tires today would have this problem???
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Old 05-06-2016, 07:12 PM
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Re: Vibration

What year is your Grand Cherokee?


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Old 05-07-2016, 11:12 AM
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Re: Vibration

Its a 2011 diesel.
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Old 05-07-2016, 02:59 PM
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Re: Vibration

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Originally Posted by Conny View Post
Tanks for reply, I have Continental contact sport tires on for now, and I have the vibration issue every time the car been sittning for some hours. I want tires with more heavy pattern and was looking at terra grip nitto. Did not realise tires today would have this problem???

It's not a huge problem, so I wouldn't lose any sleep over it, and I wouldn't go out of my way to replace the tires until they're worn out.....
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Old 05-07-2016, 10:19 PM
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Re: Vibration

Was TSB for wheel bearings on front for certain year models. 2011 wasn't on there. I'm not sure.


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