I had this problem on my 85 Jeep Wagoneer Ltd. I had about a year of use
on Goodyear tires and started having trouble. Tread looked new, but
after a lot of frustration I discovered that in fact the tread surface
of the tires was not even. This was not uneveness caused by wear, but if
I got down close and looked across the curve of the tread in direction
the tire rolled, I  could see the uneveness in the tread. It was up and
down un-eveness.  The tire was not out of balance in any way, but the
surface of the tire was up and down. It seems that sometimes in steel
belted radials the belts can move, and when they do, this creates
irregularities in the surface, sort of like an earthquake re-arranging
the mountains, raising them in one place and lowering them somewhere
else. This seemed to occur when the tires would get hot from a hard
run.. The high spots and low spots were  different everytime, and that
is what made it so hard to hunt down. Finally replaced the tires, even
though they were like new, and that solved the problem.

Regards,

John Rodgers
88 GL driver

Kurt Camealy wrote:

>I have had a vibration at 70 that won't seem to go away with tire
>rebalancing.  What IS weird is every time I take the tires back to be
>rebalanced the vibration changes.  Last time it was bad at anything
>above 70.  This time it is bad at 65 to 70 but then gets better above?
>I have replaced my whole front suspension and bearings over the past 4
>months and don't know what else to check?  It is definitely in the front
>because it shakes the steering wheel first.  When I lift the front off
>the ground I have NO play in any suspension component or the tie rods.
>The only play is a tiny bit of wheel play at the bearing.  If I tighten
>the bearing nut enough to remove every drop of play in the wheel I can't
>move that washer with a screwdriver the Bentley talks about.
>
>
>
>Thanks for any help,
>
>
>
>Kurt
>
>
>
>87 Wolfsburg GL
>
>
>