For me, the vast majority of cabin noise is tire-on-road noise. The
difference between a rough asphalt freeway and a smooth concrete one is
dramatic. That noise is transmitted mechanically from the bearings up
through the various suspension and possibly steering bits to the frame
and then into the cabin.

Sound deadening doesn't seem like it can touch that, considering how
relatively quite the ride is on smooth concrete. Deadening can affect
that residual noise (wind and stuff) but once the road is rough, I think
I'd be stuck with the mechanically-borne noise.

--
Jack "Rocket j Squirrel" Elliott
1984 Westfalia, auto trans,
Bend, Ore.

On 05/23/2015 09:57 PM, John Rodgers wrote:
> The time has come when I MUST do something about the noise level in my '88
> GL. I seem to recall some discussion about a product at Home Depot or Lowes
> that works. I'm sure theres others. Anyone know it's name? Any other
> suggestions as to what to use.
>
> Thanks..
>
> John
>