I am leaking serious water into my extension box and assume it is the cover gasket, but I am not sure how that much water could get past the gasket.
I have changed the bellows boot on the drive and shifter boot. I called Stellings today and learned they no longer have gaskets.
Does anyone know where I can buy them?
Thanks!

What's their reason for no longer having the gaskets?

The lady told me they no longer have them and did not know where I could get them.

They aren't special. Cut them yourself. Lay a bead of silicone around the both sides and tighten until it just squishes. Let sit a day then torque down.

I think glass dave recently posted the same question and got an answer...

Louie; Thanks, but I get into them at least once a year for greasing and silicone would make that difficult to do, I do appreciate your comments.

Use clear silicone then wipe off the excess. It is 10 times more watertight and easily pops off with a screwdriver. Been doing it this way for 6 years.

I am pretty sure they dont make them anymore. If you have them, start hoarding the red carriers and especially the screw on water spout.

Keith: It could be worth a try, have you ever had any leaks into your boxes?

No, never. I use clear silicone from Home Depot. The black or blue silicone from auto stores might be too strong. When I put mine on I drilled and tapped the bottom by the transom for a 1/2 NPT pipe plug. I pull regularly to ensure they arent leaking. Had a shift cable boot go bad once and it kept filling the box with water - it ruined the bearing. So I drilled and tap'ed for the plug so I can check every so often and make sure there isnt water. I also took 15 inch grease gun hoses screwed into the carrier zerk & drilled/taped the thick part of the door and put a zerk for the carrier bearing fitting on the outside so you dont have to take the covers off anymore. After you take it off one time the silicone stays and you literally need a VERY VERY small amount as it sort of makes its own gasket. Also recommend using hex head stainless bolts with 2-3 washers under each bolt so you can tighten with a 1/2 in drive socket, more tight, more even.