A low pitch rumble on decceleration could be a rear differerential pinion bearing.  Our van had this and we cured it with a reman. unit courtesy of Daryl at AA transaxle in Duvall, WA.

Mark in AK

----- Original Message -----
From: Roger Donahe <deedawg@GMAIL.COM>
Date: Thursday, March 10, 2005 8:44 am
Subject: New sound?

> In the interest of practicing some PM and listening to the sounds my
> van makes I pose this question.
>
> I am hearing a new sound in my 87 Westy.  At freeway speeds (65
> MPH'ish) going downhill if I lift completely off the accelerator I
> hear a sort of low pitched rumble from the back of the van.  It's not
> terribly loud and I do not feel any vibration.  It doesn't exhibit
> this anytime other than freeway speeds.
>
> Where should I be looking?  CV joint possibly?
>
> Thanks in advance,
> -Roger Donahe
>