Get your tires inspected.
I was getting a rumbling noise before as tires were beginning to
separate. That was normally my signal to go in for warranty.

On Sun, 20 May 2001 23:31:15 -0800 Jeff and Deb <jeffndeb@gci.net>
writes:
> Hi All, A few previous posts suggest a possible diagnosis for some
> rumbling
> noises that I have been hearing in the back of my 86 Vanagon.  It
> seems to
> be making a louder than normal low roaring sound on cornering at
> speeds
> above 45 MPH.  I have had brake work done, and had my outer bearings
> inspected, with no negative reports. Also, it seems to get louder
> with speed
> on the highway.  The exhaust system, that I thought might be leaking
> or
> contacting some object, is completely tight, and without leaks.   I
> tried
> the archives on "inner bearings" but timed out before getting my
> search to
> cover more than a year.
>
> Any suggestions on a positive way to troubleshoot it without tearing
> everything down?  Also, if it is an inner rear bearing, I assume
> that it is
> necessary to replace all four bearings, or at least pack the outer
> ones if
> they are not worn?  Any suggestions for the correct type and
> manufacturer
> for rear bearings?
> Thanks,
> Jeff Hartman
> Juneau, AK
> 1886 Vanagon

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