my first guess is that the noise is coming from a CV joint.

Get a helper to ride along. Roll down your windows. Compare notes to
see which side the noise might be coming from. Drive the van in
circles to see if sound is louder when driving in a CW or CCW circle.

Neil.

On Tue, May 14, 2013 at 5:34 PM, Geneva Saint-Amour
<genevasaintamour@hotmail.com> wrote:

> I think it is there all the time, but the sound can be heard at low speeds.  It is a rhythmic ticking noise.

--
Neil n

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