Your tire may be suffering with a tread/ply separation.

I had these kind of symptoms on a Jeep Wagoneer LTD that I use to have. Drove me
crazy. Finally got on a fresh paved street...veeerrry smooth asphalt and tested
at several speeds. It became evident. When the tires were removed for new ones,
it was amazing how difficult it was to see the slight bluge where the tread
separated from the main carcass of the tire, but it was definitely there.

Good luck.

John Rodgers
"88GL Driver

~K~ wrote:

> My 85 Vanagon has something wrong with the front right tire. I know it.
> Of course..when the mechanic drove it...he didn't think so. He alternatly
> thinks i'm paranoid and then makes me more paranoid by doing this "ooohhh..i
> don't kow..it's an old van" thing to me.
> But there was tons of snow stuff still around, so I thought perhaps i'd wait
> to see if it was ice or something i couldn't see. Now that it's all melted
> away (for now) and i've checked for rocks and weird lumps on the tire....i
> can still very much feel it.It's feels like something is stuck ont he tire
> as far as i can find a way to describe. Like a pulsing..but no sound.
> Especially at low speeds and i swear it's getting worse. Has anyone had
> these problems? I just got the tires (almost new) and they seem to be
> balanced o.k. Could it be a break problem? I also got new front pads put on.
>
> Advice welcomed..
>
> thanks!