Transmission High-Hump Gasket Seal - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MAGGEE · 05-29-2018, 09:47 PM

Is there a gasket to seal the transmission hump to the floor pan? If not, what to use for sealant?

**'68OrangeSunshine** · 05-29-2018, 10:39 PM

Lay a good [~5/16''] bead of RTV, then lay wax paper over it -- so it only sticks to one side. Attach top panel on loose, but even, don't go all the way tight. Let cure 24 hours. Later, peel up wax paper, and bolt down. Should yeild a good water-tight seal that is reusable.

cornerstone · 05-29-2018, 10:48 PM

Quote:

Originally Posted by 68OrangeSunshine;8271189]Lay a good [~5/16'

bead of RTV, then lay wax paper over it -- so it only sticks to one side. Attach top panel on loose, but even, don't go all the way tight. Let cure 24 hours. Later, peel up wax paper, and bolt down. Should yeild a good water-tight seal that is reusable.

Thanks! That sounds like a great idea. I needed that advice as well!

**'68OrangeSunshine** · 05-30-2018, 04:02 AM

Quote:

Originally Posted by cornerstone

Thanks! That sounds like a great idea. I needed that advice as well!

Happy to help, my Friend.

OregonNed · 05-30-2018, 01:05 PM

That is an awesome idea! I am replacing mine currently and bought the RTV last weekend. Thanks for sharing the tip!

gearheadperkins · 05-31-2018, 06:06 PM

i like that tip...

05-29-2018, 09:47 PM	#1
MAGGEE Registered User Join Date: Oct 2017 Location: Columbia, Missouri Posts: 31	Transmission High-Hump Gasket Seal Is there a gasket to seal the transmission hump to the floor pan? If not, what to use for sealant?

05-29-2018, 10:39 PM	#2
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,504	Re: Transmission High-Hump Gasket Seal Lay a good [~5/16''] bead of RTV, then lay wax paper over it -- so it only sticks to one side. Attach top panel on loose, but even, don't go all the way tight. Let cure 24 hours. Later, peel up wax paper, and bolt down. Should yeild a good water-tight seal that is reusable. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.

05-30-2018, 01:05 PM	#5
OregonNed Registered User Join Date: Dec 2012 Location: Vancouver, Washington Posts: 1,644	Re: Transmission High-Hump Gasket Seal That is an awesome idea! I am replacing mine currently and bought the RTV last weekend. Thanks for sharing the tip! __________________ 1968 Chevrolet C/10 LWB - 327, TH350 - 4/5 Drop

05-31-2018, 06:06 PM	#6
gearheadperkins Registered User Join Date: Jul 2007 Location: Johnson City, TN Posts: 97	Re: Transmission High-Hump Gasket Seal i like that tip... __________________ 1972 Chevy C10 400sbc 4sp Matthew 4:19 And he saith unto them, Follow me, and I will make you fishers of men.



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