I have a 07 2 door, that I has a vibration after i hit 45+mph anything under 45 mph no issues.
It drives down the road fine no pulling just a vibration one you hit 45mph.
I have had it allinged, and the wheels balanced, also updated the trac bar and also beefed up the frame mount trac bar bracket ( it is not a death wobble)

In town at under 45 live is good...at 45 and over it gets a vibration from the front.
Any suggestions?

Front U joints?
Bent front drive shaft?

Also it is a stock 2 door with JKU rubi coils and shocks and a leveling kit from TF... so it shouldnt be any wierd angle problem.
The front axle does have a ARB locker with Sleeves and gussets, but this shouldnt cause and issue?
I do have the ABS/Wheel slip light on but my steering wheel is strait and I do not have brake pull or anything.
Any help or suggestions would be great.

 

My sister's 2 door is doing the exact same thing. She only has spidertrax spacers, everything else is stock.

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Did you go mudding? if theres anything on the wheels (could be on the inner part) it will shake at higher speeds...

 

I forgot to mention...i have wheel spacers too....Interesting....

 

I dont think it is the wheels itself...had them balanced and it still shook... I assume if there were mud in there the tire store guys would have removed it before balancing...but then again.....

 

Hmmm.....mine does this also but doesn't start till around 60-65. No lift and 35's no spacers

 

Do you have stock tires? If not, it might be a faulty tire then. Thats what I had. They seemed to balance in the shop but shook the jeep when driving over 60Km/h.

 

i just started having this after installing 35's. but mines weird it starts at 40 and ends at 45. any other speed no problem at all.

 

If a wheel spacer is not perfectly balanced (crappy metal) it can have a high and low side to the balance throwing it off once the weight is spinning

 

I had the same problem since I change the wheels and tires. 45-50 mph started to vibrate. I went to align and balance about 8 times and could not find the problem. Just for curiosity, I asked em to change the wheel spacers and TAN-TAN! The problem was solved! It may be that your adapters be defective! TRY IT...