BlueXJ

Well he is probably half way around the world and who knows what kinds access he has to the interweb.
As for my ***** that is a very personal question don't you think?

okcjeeper

I'd be willing to bet around midnight board time we will see a reply.. Just looking at his post history he's a late night poster well in our time zone anyways..

BlueXJ

We live in a time that worlds away are not sufficent for those who want instant gratification. I admit that I am sometimes caught up in that mentality, but I try to resist it.

okcjeeper

instant gratification....what's that...?

BlueXJ

Thats the interweb life. I want it now. Like in my school days we went to check things out in a book but today everyone has forgotten books in favor of the interweb. Want to know where to find a widget then Google Fu it and TaDah there it is right on your monitor saying how many widgets for you today sir!
Well you get the idea!

Arab1970

the vibration is in the steering wheel and the passenger seat!!! they vibrate at the speed of 50mph and then it finishes .... I've changed the tires and palanced the rods about two months ago ...

Kyle

You might want to check to make sure the tires are wearing properly and are balanced properly.

Arab1970

you mean the front tires only? and what does wearing mean?

Kyle

Like if they are becoming uneven.

BlueXJ

Check also the other things that have been mentioned such as Tie Rod ends, Control arm bushings and trackbar bushings. All of which may cause the vibration you describe.
We have been wondering if you would tell us where exactly you are located? You enticed us the other day by saying that your country was boiling which is an odd description and started us wondering about your location.
Report back and let us know if any of our suggestions are the correct ones.
Blue

Arab1970

it's because the temperature in my country reaches 50C in summer!!

BlueXJ

Where is that exactly???

Arab1970

in the Arabian Gulf

BlueXJ

You are right it is very hot there this time of year.

muddeprived

Sounds like tires or maybe a bad u-joint in the driveshafts. Try rotating the front tires to the rear and put the rears up front and see what that does. If the vibration changes then you are narrowing it down. Have those tires been balanced? What year is your jeep? It wouldn't hurt to remove the front driveshaft and take it for a spin. That'll eliminate the "angry sparrows" vibration that's common with the front cv driveshaft assembly. It dries up over time and needs regreased or rebuilt.

I'm guessing when you said "changed the tires and palanced the rods", you mean you balanced the tires and changed the tie rods? ?

The tricky thing about xj's is it's unibody construction doesn't allow us to pinpoint a vibration to a particular area of the jeep. What could be vibrating on the left rear tire would be felt up front too cuz the vibes will travel through the unibody since there's no bushings like body-on-frame vehicles to quiet it down. For instance, i had a nasty vibe around 45 mph. I felt it up front and dug for the problem for a couple weeks, replaced every steering components and axle parts and it never changed. It was the rear driveshaft.