Major Vibration
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Freshman User
Joined: Dec 2003
Posts: 29
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Major Vibration
I have an 03 Ex with a 6.0 . It has a 6" lift and 35 x 12.5 nitto terra. I recently installed new u joints and have had the tires balanced on Ex. I have a mojor vibration when I exceed 60 mph. By the time I reach 70 mph the truck feels that it may shake apart. Any ideas what it may be, where i should start. Any help would be greatly appreciated.
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
I'd start with the cheap stuff myself. If you have a protractor, you can build an angle gauge with a string and weight. Measure out the driveshaft angles. I think it goes one ujoint per end angles are complimentary(adding up to 180 degrees) and if you have a CV (or two ujoints on one end) the angles should be equal. I'm not real sure about dual shafts and carrier bearings, but I'm sure it's available on line.
Then I would have the tires road forced balanced. With roll out and weight on the tires they could be acting up differently than when they are balanced on a normal machine. This would also make my next big step having the shafts balanced.
Then I would have the tires road forced balanced. With roll out and weight on the tires they could be acting up differently than when they are balanced on a normal machine. This would also make my next big step having the shafts balanced.
Elder User
Joined: Dec 2006
Posts: 762
Likes: 7
Do you have a DISCOUNT TIRE CO. store near you. To my knowledge, they are the only major tire store chain left that still equipps their stores with a "tire knife". That is a device for "truing" the tire's outer diameter to the wheel center. You can get an "out-of-round" tire PERFECTLY balanced and still have horrendous vibration of the kind you describe.
Modern radial tire technology being what it is today, I would be surprised if that is your problem, but if the other's advice to you on ruling out the drive shaft dosnt resolve it, that would be my next step.
Modern radial tire technology being what it is today, I would be surprised if that is your problem, but if the other's advice to you on ruling out the drive shaft dosnt resolve it, that would be my next step.
