Suzuki: 1999 Suzuki Grand Vitara Vibrate/shake at 55-70 mph, suzuki grand vitara, wheel alignment

Question
Hi,
I have 1999 Suzuki Grand Vitara 4 doors 6V Vibrate and shake at 55-70 mph. I have changed the following:
- New tires
- Front wheel Baring (both sides)
- Engine and transmission mount
- Front Shaft bearing
- Shaft joint
-  New breaks pads
- Bar bushing
- Wheel balanced more then once
- Wheel alignment performed more then once
-

And the problem did not go a way. This is not during breaking this only at speed 55 – 70 mph.

Thank you.  

Answer
I can't think of anything else.  Go to IATN.net and use the shopfinder on the first page.  At least the technician you find there will be ASE certified, and will have a chance of finding it.  Sometimes driving it will help the tech diagnose the problem.
scotty