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Vibration at High Speed
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=31685
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Author:  Mykol [ Sat Apr 19, 2008 10:50 pm ]
Post subject:  Vibration at High Speed

The other day I went to pass a couple of slower vehicles and at around 85 or so, I felt minor vibration. Any ideas?? Thanks

Author:  Sir Sam [ Sat Apr 19, 2008 10:57 pm ]
Post subject:  Re: Vibration at High Speed

Mykol wrote:
The other day I went to pass a couple of slower vehicles and at around 85 or so, I felt minor vibration. Any ideas?? Thanks


How long since you had your tires rotated and balanced?

Author:  litton [ Sun Apr 20, 2008 9:18 am ]
Post subject: 

Also tire related....Do you still have the OEM tires? In AZ, we cruise at 85 and mine did that until I put on the Coopers.

Author:  jinstall [ Sun Apr 20, 2008 2:51 pm ]
Post subject: 

Driveshaft. Mine does it at 90-98 mph very irritating.

Author:  kelticknight [ Tue Apr 22, 2008 1:00 pm ]
Post subject: 

was tires for me,changed to goodrich,havent had since
also can be balance or alignment of from tyres

Author:  Mykol [ Tue Apr 22, 2008 11:27 pm ]
Post subject: 

This vibration sure feels to be in the drivetrain. I don't feel it at all in the steering wheel. I replaced the OEM with Michelin LTX M/S about 20k miles ago. I rotate the tires every 2500 miles, but will get them balanced again soon just to rule that out. Jinstall, is your driveshaft unbalanced?? Any others with this problem?

Author:  kelticknight [ Wed Apr 23, 2008 7:00 am ]
Post subject: 

did have a problem with shaft last year where was a little vibrate and changed it so you could be right,did you check the joints

Author:  chrispitude [ Wed Apr 23, 2008 7:01 am ]
Post subject:  Re: Vibration at High Speed

Mykol wrote:
The other day I went to pass a couple of slower vehicles and at around 85 or so, I felt minor vibration. Any ideas?? Thanks


Mykol,

Go here:

http://www.gsp9700.com/

and find a Hunter GSP9700 road force machine near you. Ask specifically for a road-force balance. It's worth the money, but you may wish to call around and check the prices of road-force balancing. If you still have a vibration you will be absolutely sure it's not the tires.

I use this balance on all my vehicles, and will never go back to conventional dynamic balancing again.

- Chris

Author:  kelticknight [ Wed Apr 23, 2008 7:03 am ]
Post subject: 

hunter are good,friend owns one and swears by it

Author:  Desert_Busa [ Wed Apr 23, 2008 10:39 am ]
Post subject: 

Did you put wheel locks on? This caused a high speed vibration on mine.

Author:  kelticknight [ Thu Apr 24, 2008 9:02 am ]
Post subject: 

dont know if this helps,probly not
when i bought my kj ,it was used,got vibs at speeds over 65,turns out the person before me never drove it above that speed,so gently i increased speed over weeks and dont have no more

Author:  jinstall [ Thu Apr 24, 2008 2:01 pm ]
Post subject: 

Desert_Busa wrote:
Did you put wheel locks on? This caused a high speed vibration on mine.


I noticed this as well with the Jeep (McGuard) locks.

Mine is 100% Driveshaft. I cannot find a place here that balances driveshafts.

Author:  scrambledKJ [ Thu Apr 24, 2008 9:12 pm ]
Post subject:  vibe

One of the higher-ups at Daystar rode in my libby the other day and asked about the driveline vibe. Its the front butterflies on the driveshaft. Was kinda embarassing...



Travis

Author:  Desert_Busa [ Thu Apr 24, 2008 9:25 pm ]
Post subject: 

jinstall wrote:
Desert_Busa wrote:
Did you put wheel locks on? This caused a high speed vibration on mine.


I noticed this as well with the Jeep (McGuard) locks.

Mine is 100% Driveshaft. I cannot find a place here that balances driveshafts.


Try taking the drive shaft off and rolling it on a smooth flat surface. A very slight bend will be noticeable. It is most likely bent and will need a new shaft. If it is true it can be balanced, but you'll need to find a shop that replaces the shaft... they'll have the tools to balance it.

There's a place around thomas and grand but I doubt that will be much help... A friend used to work at the following:
Precision Drive Lines of AZ
3225 West Osborn Road Phoenix, Arizona 85017
Phone: (602) 269-1355

Author:  jinstall [ Fri Apr 25, 2008 3:29 pm ]
Post subject: 

Thanks I will keep looking as I cannot be without the KJ for 3 weeks.

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