Re: Wind noises due to poor insulation of cabin?
I'm not familliar with any particular situation that deals with this, but try this: 1) When it's dark outside, or in a garage with the lights out have someone shine a bright light from the underside and around the door (shut), while you look to see if you can see the light coming in. 2) (if that doesn't work) use a source of smoke from the outside to see where it might come in...DO NOT USE FIRE!...maybe a candle blown out repeatedly or something...maybe something smoldering. I can't express the amount of care that must be taken...you do have fuel lines under the truck! I would use a bucket of moistened pine straw where I live, but I don't know what's available to you. They also have a "sniffer" bottle at most home-centers or hardware stores. They are used to check for drafts around windows, doors, electrical outlets, etc...It contains a VERY fine powder that will "float" in the air, that is drawn to moving air currents. Because of the moving air current thing, you may have to turn the A/C on high, and watch for it blowing the powder AWAY from the truck in a particular spot.
Good luck on finding it...these are the types of things that can be the hardest to diagnose. I still have a "jingling" noise in my '99 f150 that no mechanic shop or home mechanic has been able to find. I heard it driving off the lot when it was new, and I hear it every time I drive it...thank God for a loud stereo!