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73-87 Chevy _ GMC Trucks => Body, Glass & Paint => Topic started by: beastie_3 on January 13, 2010, 10:27:33 pm

Title: Removed transmission hump
Post by: beastie_3 on January 13, 2010, 10:27:33 pm
Yup, I was bored and wanted to know what the top of my transmission looked like (not really, I wanted to clean the top of the tranny and T case) so I removed the transmission hump. There were two types of sealant. One that was between the two lips (floor and hump) was red. I thought it was rust at first, but I believe it was red foam. 30 years later, it didnt look like foam. That was probably there to prevent metal on metal squeaking. I took a wire wheel and got it all off and cleaned up the lips. The second sealant was a white-ish rubbery compound and that was applied after the hump was bolted in. It sealed up the edge and was harder to remove. I had to use a razor blade to get most of it off. That was probably to keep the mud/snow/oil/water etc out.

Any suggestions on what I can use to put it all back? I was thinking of doubling up some foam that comes in a roll and has one sticky side and then using a glass sealer on the edge after its bolted back in.
Title: Re: Removed transmission hump
Post by: Blazin on January 14, 2010, 12:13:45 am
The foam will work good. I would use seam sealer on the edge to cover the joint. You can buy it by the tubes or qt. can.
Title: Re: Removed transmission hump
Post by: VileZambonie on January 14, 2010, 05:16:28 am
You can run a bead of RTV on it and let it cure before you put it back on.
Title: Re: Removed transmission hump
Post by: Stewart G Griffin on January 16, 2010, 06:35:05 pm
Did you have to cut the cover out, or is it just bonded in?
Title: Re: Removed transmission hump
Post by: Donut on January 16, 2010, 08:40:13 pm
By reading, I'm under the assumption it's the bolted in, 4x4 hump.

I used the foam on mine, (actually I think Blazin suggested it).  I didn't do seam sealer until I put the rubber mat down.  Drove it all winter/spring with just the foam. (and steel floors)
Title: Re: Removed transmission hump
Post by: beastie_3 on January 16, 2010, 09:25:18 pm
Stewart, ya its just bolted in with the original seam sealant. I found the edge of the hump and traced it with my box cutter all the way around and popped it off.

When I put the foam on and bolted it back down, I have no reason why, but I forgot to paint the bare metal edges before putting it back on (dummy). The bare metal is from the wire wheel I used to take the old foam off.