Most likely you one or two bad tires. Michelins are known for this.
Balancing is only a temporary fix. At speed, the belts change shape and
the tire deflection at the road  changes thing further.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of Kim Springer
Sent: Monday, September 12, 2005 12:33 AM
To: vanagon@GERRY.VANAGON.COM
Subject: vibration

Hello list,

After looking into tires I decided to buy Mich. LTX MS 195/75-14.

I had them mounted and balanced.  What a quiet tire, feels good on the
road..I'm happy.

Only thing, a vibration that I think is tire balance.  So I have the
front end checked.  Done with crow bars according to the mechanic...it
all looks fine they say.  Not a surprise as the Tristar only has 75K
miles on it.

So back to the tire shop and they "road force" balance the tires.  One
is a bit out (not a great tire but OK, rim is fine), they rebalance them
all.  They put the worst on the rear.  The ones on the front are
perfect, so they say.  This is a very reputable tire shop.

I still have the following issue: At 75mph I really have a shaking
steering wheel.  Some of the time at 65mph it's smooth but sometimes get
to shaking again.  If it's smooth, and I'm going straight, it seems like
it stays smooth.  If I take a curve (on the freeway), then it will start
to shake.

My gut feeling is that if the tires/wheels on opposite sides of the
truck are in positions that are "happy together", then all is well.  If
I take a curve and the tires move to a different position relative to
eachother, then things start to vibrate again.

I can't believe that is the actual issue.  I've never had anything like
this before.  Anyone out there ever dealt with this?  What's next?

Kim Springer
'89 Tristar 2WD White.