I posted on this a while back but my search feature doesn't find "ALL" my posts and I can't simply update it. Pity caus someone asked me to tell him what I found in a PM cause his car was really loud.

Here is what I did to quiet my Lex.

1. Removed my trunk liner and glued sheet rubber to the inside of the rear fenders with contact cement. Into the space behind and around stiffiner metal I shot expanding foam. The rear fenders had a tinny ring before but now have a dull thud when tapped.

2. There is a cavity above the fender well that connects the trunk area to the cavity behind the rear seat. I used a length of hose to feed tripple expanding foam to fill it.

3. I removed the rear seat and glued rubber to all metal that resonated when struck.

4. Removed the rear interior side panels and shot foam and glued rubber.

5. I pulled the door panels and glued and foamed.

After doing each of those things and addind maybe 10 pounds to the car I still had a lot of road noise. Everything I did made the car a little quieter but not silent. At that point I had to go back to my original theory which was that the door gasket wasn't sealing. The noise sounds like it is behind your head but it echos around. The very first thing I did was to put a strip of paper in the door and see if it could be easily slid out. It couldn't and I concluded the gasket was making positive contact. WRONG! It wasn't.

6. I "MISSADJUSTED" my striker plate to cause the door to shut very tight. Now you can hear a pin drop. The noise problem is caused by the door gasket shrinking with age and the door being slightly out of adjustment. Try resetting the striker plate first. after that the gasket must be replaced for major $. This must acount for 70% of the noise and 100% of the agravating noise.

I still recommend the entire process for those that have the time and energy. My car sounds like a bank vault now.

Happy trails to you.

John