Thanks Dave, Ive got the TRF heavy duty underlayment which is actually 
thinner the the regular so I think that should be ok.  Thanks for your 
help,  John
Dave Massey wrote:
>Message text written by John Mitchell
>  
>
>>          While replacing my interior, Ive decided to switch to the 
>>    
>>
>plastic transmission cover and was wondering if added sound deadening 
>material was needed.  It just looks so much thinner than the fiberboard 
>original. 
>            Also, does anyone have experience with the Dynamat type 
>products for reducing vibration related noise.  Don't get me wrong, I 
>love the sounds the car makes, but vibrations and rattles kinda drive me 
>nuts.
><
>
>John, I think the Dynomat stuff (the version Fred Flintstone used ;-) ) is
>intended to dampen panel resonances.  It does less for transmitted noise
>from the engine bay.  Since the plastic tunnel is less prone to resonating
>I don't think you'll need it.  But you will want to put some insulation
>there to block out road/engine/transmission noise as well as the heat.  Get
>some carpet underlayment fo the application.  Get thin stuff.  The thick
>stuff will interfere with the installation fo the carpet and the yoke.
>
>Dave Massey
>71 TR6 (with the TRF Thermoplastic transmission tunnel cover as well as the
>driveshaft tunnel cover and glovebox)
 
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