06 Jeep Wrangler X - Problem with Shimmy in Steering Wheel....

This is my second attempt,
my first message ended up with:
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Hi all,

I have a new "06 Jeep Wrangler X" (Great Jeep!) with a grand total of
6192 miles.

When I drive about 60 mph on the freeway, the steering wheel wants to
"shimmy", i.e. turn to the left, then to the right and vice versa. I
have to hang tightly on this steering wheel or slow down to about 50
mph. I could really end up in the next lane, to the right or left.
It's really noticeable with the cross winds or on windy days. Slower
speeds on the regular city streets, it's OK.

I had it to the dealership last month and they test drove it and they
found nothing wrong. I also use this same jeep, to tow behind my RV.

Do I need more air pressure in the two front tires of this jeep, or
what else could be going on here????

There is a NHTSA ODI - Technical Service Bulletin out there and I'm
going to follow up on it.
Make : JEEP
Model : WRANGLER
Year : 2006
Manufacturer : DAIMLERCHRYSLER CORPORATION
Service Bulletin Num : 1900306
Date of Bulletin: AUG 30, 2006
NHTSA Item Number: 10020334
Component: STEERING
Summary: STEERING SHIMMY. *TT

Has anyone experience this same problem, if so...how did you solve
it??

Thanks,
: -)
Larryariz