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  #25  
Old 11-11-2011, 05:36 PM
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Re: Vibration at 68 to 73 mph

Ratchet, Thanks very much for all the info. I have pretty much the same setup as you do with the 18s and MS2s and I still have very slight vibrations running 38psi so I was wondering what pressure you had finally settled on? I started out with 20s and the GY Forteras which I think are the worst factory tires I have had on any new vehicle - ever. And of course GY found no problems with mine. Why Jeep would do something like that is beyond me except I guess not many 20s are available for SUVs. I traded them in on the MS2s and for some OEM 18s on ebay and it is a different vehicle - much better ride and handling. Now for the final tuning.
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  #26  
Old 11-11-2011, 10:46 PM
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Re: Vibration at 68 to 73 mph

Road surfaces differ in all areas so you'll have to experiment. Try starting at 32psi cold and work your way up from there. I settled on 36psi cold.
The compounds in these MS2's are tempermental. Very tempermental. On cold tires, as soon as I hit the big roads which are only a few miles from my house, I have a small amount of vibration. After 15 min or so at highway speeds, as the tires warm up, the vibration subsides.
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  #27  
Old 11-11-2011, 11:00 PM
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Re: Vibration at 68 to 73 mph

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Originally Posted by Ratchet View Post
Road surfaces differ in all areas so you'll have to experiment. Try starting at 32psi cold and work your way up from there. I settled on 36psi cold.
The compounds in these MS2's are tempermental. Very tempermental. On cold tires, as soon as I hit the big roads which are only a few miles from my house, I have a small amount of vibration. After 15 min or so at highway speeds, as the tires warm up, the vibration subsides.
Ok, thanks. I'll give it a shot.
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  #28  
Old 11-12-2011, 07:14 AM
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Re: Vibration at 68 to 73 mph

had my 2012 summit in last week for same problem they did a rebalance,found the left front tire had a bad road force,spun it around 180 the road force was better but not good enough wound up replacing the tire with a new one rides perfect now. had a similar experience with my 2011 ram laramie,they switched tires and rims from another new vehicle and it was worse after 4 days they had switched rims 4 times,driveshaft, and finally put on 4 new latitudes 20" which cured the problem ,then it was time for a upgraded torque convertor to get rid of the growl and vibration now that it's all done that one is 99% better.
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Old 11-12-2011, 11:29 AM
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Re: Vibration at 68 to 73 mph

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had my 2012 summit in last week for same problem they did a rebalance,found the left front tire had a bad road force,spun it around 180 the road force was better but not good enough wound up replacing the tire with a new one rides perfect now. had a similar experience with my 2011 ram laramie,they switched tires and rims from another new vehicle and it was worse after 4 days they had switched rims 4 times,driveshaft, and finally put on 4 new latitudes 20" which cured the problem ,then it was time for a upgraded torque convertor to get rid of the growl and vibration now that it's all done that one is 99% better.
At least your dealer did something. Mine said go to GY. GY said no problem with tires, problem is with vehicle. Took it to my long time friend and tire dealer who put it on his balancer and showed me that two of the tires were out of round and one really bad. So I gave up on GY and the 20s.
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  #30  
Old 12-20-2011, 04:07 PM
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Re: Vibration at 68 to 73 mph

So this could just be a coincidence but I went in to get a synthetic oil change (it was free for doing a mystery shop) and now the vibrations are gone.
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Old 12-20-2011, 04:51 PM
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Re: Vibration at 68 to 73 mph

Ratchet:

Thank you for reporting your results; but - for the less schooled: what are MS2s?

On a side- after having worked at a OEM T1 wheel supplier I can say with little doubt that tire suppliers AND wheel suppliers struggle with run out and balance on a very routine basis. There are some things that OEM release engineers will do to make it so that the (tire+wheel) run out and or imbalance is felt less at the vehicle level. While it MAY be possible to make perfectly round wheels and tires at a supplier's location, Chrysler (nor any other OEM - premium ones included) will pay for the amount of money on a per part basis to make this possible.

The fix that is being refered to as "mount the tire 180* to where it was" is what OEMs call "match mounting" - where the low spot of a wheel is match mounted is to the high spot of a tire - and then the tire/wheel combo is balanced. With out going too much further than that and putting readers to sleep, there OEMs that will do clever things ("induced runout") so that the system can be balanced accordingly.

Finally, I agree that the Lattitudes for the past 18k miles are less than great for this truck. Then the time comes near, I will be replacing with something different.
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  #32  
Old 12-20-2011, 10:33 PM
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Re: Vibration at 68 to 73 mph

The MS2' are Michelins new model.
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  #33  
Old 01-09-2012, 10:11 PM
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Re: Vibration at 68 to 73 mph

2011 Hemi Overland same vibration at 68 to 70 mph, returned to dealer at 800 miles. The dealer replaced all the tires and Road Forced balanced increasing the tire pressure to 40 psi.

The vibration is gone (for now).
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Old 01-09-2012, 11:16 PM
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Re: Vibration at 68 to 73 mph

My problem is gone as well.... I ended up picking up a nail so I took the wheel in and had it patched. The removed the tire, patched then rebalanced that one tire and now my issues are gone. This tire was previously road force balanced as well. It could simply be one tire.
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Old 01-15-2012, 10:11 AM
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Re: Vibration at 68 to 73 mph

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Originally Posted by chipnjusa View Post
2011 Hemi Overland same vibration at 68 to 70 mph, returned to dealer at 800 miles. The dealer replaced all the tires and Road Forced balanced increasing the tire pressure to 40 psi.

The vibration is gone (for now).
Did they replace with GY Fortera 20"?

I have same problem through 1700 miles. Balanced 3x and still shuddering. District manager supposed to drive this wk.
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  #36  
Old 10-07-2012, 03:24 PM
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Re: Vibration at 68 to 73 mph

So are you saying the solution is to buy new aftermarket rims or do all kinds of re-balancing to the OEM tires?
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