Hub caps can sometimes make a clicking sound when driving slow.  Have you tried
the van with them off?  Joel Hembel

Vic Ahmed wrote:

> Folks,
>
> I have a situation here with regards to a very nice 83.5 Westy that I'm
> fixing up that has even an old pro like me baffled. It's an automatic, 110K
> miles, drives really smooth and strong, shifts real nice and solid, but every
> time I slow down to stop, it makes this funny rythmic clicking noise that
> changes it's frequency right along with the speed of the van. The sound seems
> to be coming from the back of the van. It usually starts when I slow down
> below 25mph and continues until I come to a stop. It'll also do it, altho'
> just for a few secs, when I take my foot off the brake and let the car creep
> along in drive. But if I power it, no noise! Also, on decelerating, it doesnt
> make that infernal noise until the car is slowed down to below 25mph. Now,
> I've changed both the drive-shafts, and replaced both rear wheel bearings,
> checked the final drive flanges for tightness, replaced the final drive
> lubricant (no metal shavings found), and serviced the automatic trans (again,
> nice and clean, no metal). This thing's got me puzzled, as it's kinda
> annoying sound, but it doesnt seem to affect the drivability of the van, it
> drives just great! That's the strange part. Could anybody offer me any
> suggestions on what to do next, as I'm about ready to pull my hair out and
> become an alcoholic....... any help would be highly appreciated. i've already
> spent too much time on this car and I need to have it finished so I could
> move it. Thanx.
>
> Cheers,
>
> Vic Ahmed