Leaking 833 transmission case

[Bill76]

My tranny case has a very small leak in the bottom of the case (like 3 drops a day) The leak is in the cast iron I am positive about this. I called Brewers about this and he said it was probably porosity in the case and to seal it up from the inside and he has seen it before.
My question is what to seal it up with. I just dropped the case off at the shop to have it cleaned in the caustic tank and magnafluxed just to make sure its not cracked.
What would you all recommend to seal it if is just a pin hole.I remember painting inside of engines with some kind of red stuff back in the day I don't remember what it was called or should I just put some JB weld in side it---anyone got any better ideas
I should have asked Brewers but he seemed very busy getting orders out .
If its a crack I'll toss it but if its a pin hole I am good with just sealing it up.

 

[91r/t]

Marinetex epoxy sticks well to cast. Had a guy I know fix a cracked engine block in the intake coolant area with it and that is cast iron as well. It would seal that up no problem. Apply a thin layer in the case over the area and never look back. There's no pressure there or heat so it'll last forever.

 

[gkent]

Glyptol

 

[steve340]

I used JB Weld on a porosity in an aluminium timing cover and it worked well.
You could gently grind into the crack area and rough up the bottom of the "pit" to give the epoxy something to grip to.

 

[steve340]

Something I forgot earlier is to grind little "hooks" in the pit to retain or lock the epoxy.
Also soak,clean with a powerful solvent to get any oil out after you have done the grinding. Clean and blow off with dry compressed air a few times.

 

[chignikred]

You sure it isnt coming out of the reverse lever shaft, at the bottom of the case???
Commonly never removed to replace o-ring on a 'rebuild'. Reason, it isnt easy.

 

[dadsbee]

Back of the rocker cover...

 

[Meep-Meep]

I had a case where a weep was from a side cover gasket. There was a thin section in the gasket from a hole that didn't need to be there and I thought that was odd. I used it anyway thinking I'd just make sure the gasket was positioned properly but for some reason - maybe while seating the side cover - the gasket slipped and part of the hole was exposed causing a small drip.

 

[Bill76]

I cleaned it with brake cleaner and then dusted it with baby powder and the leak is right smack dab on the casting line , no leaking gaskets or o rings .Good news is it passed the mag test with no cracks.
Soaking it in MEK and then going to coat it with some epoxy my brother pinched from work. I will let you know how it works
Thanks Bill