Retrosound, Amps & Sub Install

mopar79sean said

On the vibration you are getting from the trunk lid you have some options that won't require welding. One would be to get the adhesive like they use on the hood of our cars and start bonding the under bracing to the outer skin. Another option is to get a product like Hushmattl or dynamat. These products will take care of the vibration but they do add weight. My 70 Dart will get a full hushmat treatment before I put the interior back in. I hope this helps a bit.

Click to expand...

Thanks for the adhesive idea, I never thought of that. I went and spoke to my local panel guy to get his thoughts on that idea. He recons that welding, gluing and filler foam is a bad idea. These will cause the trunk is be ridged. He said the skin needs to move due to hot/cold etc.
He sold me some gunk that has the same consistency as the seam filler on our cars, it will hold but stays flexible. Just got to work out how to apply it.

Me and a mate both put pressure on the trunk skin to see if we could deaden the sound, it's still there?
This got me to look a bit closer. I found the parcel shelf, the number plate, the rear bumper and the sub speaker itself to making noise. The trunk seal is buggered as well.

I will fix all the above problems and see how it sounds.
Dynamat is on the list hopefully it will help as well.