Gearbox cover Seal

[BruceClarson]

Good Evening, I’m new on here and have a question for you clever people , I currently have the engine and gearbox out of my 3.8 F.H.C my question is when I removed the steel gearbox cover from the gearbox tunnel there was a rubber seal which was in really poor condition i need to replace this but am struggling to find one , does anyone on here know a supplier ??
Thanks in advance
Bruce

[rswaffie]

Hi Bruce,
The 3.8 parts manual doesn’t specify a seal between the cover and the floor, just the fasteners. SNG doesn’t list one either. One mine, there was evidence of some sort of sealant - could it be that?

[Series1 Stu]

I think you're right, Richard.

I used something like Sealastic or Tiger Seal on mine, which is a plastic cover. I wish I'd managed to get a metal one (I thought they were aluminium).

Good luck with the re-assembly, Bruce.

Regards

[Heuer]

There should also be some foam in there as well Part number BD27833:


It is just 2" upholstery foam (about £5 from an upholstery shop) which you can carve to shape with a bread/carving knife and goes into place after the gearbox has been fitted and before the top cover. You need to keep heat out of the cabin and also fumes/dust so try and get as good a seal as possible.

Under the tunnel, DEI reflective aluminium or similar is perfect:

https://www.designengineering.com/floor ... i-21-x-24/

[dxke38]

My 64 3.8 fhc definitely has a rubber seal around the metal gearbox cover. Had the car 50 years and assume it to be original fitment but who knows?

[andrewh]

MY 62 car which had never been apart when I restored it, had a green fibreglass cover bedded on Dum Dum . The DD was used by most manufacturers to fill gaps and stop water ingress . There are other similar products available and I bought some strips of similar stuff from Frost Automotive. MY trimmer then covered the whole lot in sound deadening foil.


This is the stuff I bought to use instead of Dum Dum as its not available any more.
https://www.frost.co.uk/eastwood-flexib ... placement/

[Busboy]

My 61 3.8 dhc has a fiberglass tunnel cover. I modified it with an all synchro gearbox. I believe the original part was a metal tunnel cover. Anyone know if it would fit over the all synchro gears or just the Moss box?

[Allrand]

On my 64 3.8 with the steel cover I used generic self adhesive door seal stuck around the edge of the tunnel opening, works well.