High speed vibration

[xt master]

I am getting a vibration starting around 55mph..get bad around 70mph..Any ideas what is causing it.I feel it alot in the steering wheel.It is a very fast vibration.Possible something with the drive train?U joint maybe?Any info would be helpful.

97 TJ
2.5l
31" tires
Stock suspension

 

[Operation 4x4]

How about trying a wheel alignment. Usually this is a fix to the whole high speed vibration. I really don't think its your drivetrain or u-joints. Usually the vehicle will shake constantly with these sorts of problems. My jeep used to shake at high speeds (60 - 70 mph). Any other speed was fine. I got an alignment and it fixed that problem fast.
There's my two cents.

All the best,
Chris

 

[riden dirty]

Any recent changes? Could be tires off balanced, usually 55 mph is a key speed for unbalanced tires. Possibly threw a weight... thats my nickel!!!

 

[xt master]

Only thing that has been done was about 3 months ago i had a new track bar installed in the front and they did an alignment then.I will have the tires rebalanced,it has been a long time and with off roading who knows if I lost a weight.

 

[TerryMason]

I'd go with a lost wheel weight too - especially if it started out of nowhere.

You could put the front tires on the back and see if the shaking changes feel.

 

[Sine Deviance]

Yeah, wobbling only at high speeds says tires to me as well.