After undergoing a recent clutch replacement on my TR6, I did two things upon
replacing the tranny cover to insulate:
1)I got some thick weatherstriping and lined the mating surfaces of the
original cardboard tranny cover and the steel surfaces of the car. This took
care of any and all air leaks along the joint.
2)I took some old shag carpet and my existing carpet and outlined it on the
shag carpet. I then cut out the shag with a 2 inch inset cut. I then laid the
shag carpet over the tunnel(shaggy side down) and tested for fit and made final
cuts. I then put the original carpet over it and fitted the cross-member to
test the fit and after making a few more cuts, put it all together.
The sounds and drafts coming from the ground,exhaust and tranny ceased. I noted
that sounds I used to hear inside the car I now heard coming from outside the
car echoing off gard rails, ect. from underneath the car. I liked it so much I
did the same thing for my foot areas. Heat insulation was not a priority in my
situation so the space shuttle crap or foam job may shine in this respect.
My route was cheap(about $4 of thick weatherstripping, $0 for old carpet),
quick(1 hour to cutout and re-cut carpet), and easy(everything is working from
topside of tranny cover so clearances are not an issue) with no future
foreseeable issues(fires or carpet binding on drive shaft).
This is'nt to say I'm imune from stupid stuff as I once used steel wool in
between a muffler and a heat sheild to quite the heat sheild from rattling. I
had to replace it about every 4-5 months due to it rusting. I later found out
that steel wool will ignite under such heat and so I was lucky it had not
already done so. I got the sheild welded(i.e. fixed the right way).
;-)
--
On Mon, 8 Nov 1999 18:35:57 CarlSereda wrote:
>
>Ken,
>Back in 1975 I thought stuffing carpet padding between the tranny and tranny
>cover would make a good sound-deadening treatment (it did!) but a few months
>later after coming back out to my car after a short trip I noticed the cabin
>was full of white smoke and when I opened the car door found the trannycover
>smoldering in fire! Soon firemen were shooting a flood of water into my
>recently restored car (argh!) and tore out all the red smoldering insulation
>padding with their big hooks. Needless to say oil soaked stuffing above the
>exhaust pipe was not brilliant thinking. I bought a new tranny cover and
>some black rubber 'walkway' covering about 1/8" thick (the kind that is
>ribbed on one side and came on a bulk roll in auto stores back in the 70's -
>generic car floor covering). I cut it to fit inside the underneath side of
>the cardboard tranny cover and attached it with plenty of short fat sheet
>metal screws and washers. Twenty or so years later I see it has held up very
>well and even protected the cardboard from the minor oil misting leaks I had.
>When I restore the cardboard this time around (water damage from above) I
>think I will seal underneath it with undercoating before I put the rubber
>sheet back in. One thing I think is important is to not obstruct airflow
>around the transmission for cooling purposes and am not sure now that I have
>a new overdrive unit how close the fit will be with the rubber liner.
>Good luck,
>Carl
>'64 TR4 since '74
>
><<insulating tranny cover (GT6+)
>What works best, doing it on top or on the underside? Is there enough room
>underneath? I'm thinking that would be better...leave more room for carpet
>between cover and support bracket.
>ken shapiro>>
>
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