reduce diff noise by using roofing insulation under seats?

[ssornerrad]

I read in the " E30 restoration bible " that a noisy rear diff could be attenuated by sticking roof insulation under the rear seats. Anyone tried this and did it work before I get stuck in and get all itchy from the glass wool?

[maxfield]

Not something I've ever heard of on here...

Andyboy who wrote the book is on here though...

[josh-hocking]

best ask andyboy!!

[ric325i]

well a noisy dif could be fixed with a better dif?

but i bet you have thought of that.

why not just go to a scrap yard with an e30 and and use the sound deadening from that double up on that stuff?

i would not be putting any roof stuff in my car!

[Raj_p]

Roofing materials, as in what you use on your house, YES, the roofing sheets you get from B&Q is good stuff, you may need two layers but works a treat, you can alos use this in your doors or boot to stop any vibrations caused by bass.

[Dr Firefly]

I know you probably want info, not opinions, but surely it's better to fix the underlying problem?

[Chris]

I would have thought you are better off putting some Dynomat down rather than roof insulation. I reckon the fibreglass would would be evil

[slinky2000]

jess, the diff isnt meant to be noisey.

e30 restoration bible, never heard of it but I did find it

http://www.bentleypublishers.com/product.htm?code=H740