3 thoughts come to mind:

1. Are you absolutely sure it is coming through the pan and not leaking from somewhere else? Not sure what you have done so far, but if it were me, I would go through the other possible leak sources once again, before blaming the pan.

2. If you bought the Ragusa pan because the finned design assists with oil cooling, then coating it would degrade that somewhat as it would act as in insulator. If you already have adequate trans fluid cooling on your rig for what you use it for, and just bought the pan for some other reason, (Replace a damaged pan, increased oil capacity, etc) then this point is moot.

3. If you choose to coat it, I would be leary of coating a used pan on the inside --especially if it is porous. Getting all the oil out of the metal would be difficult, and any oil left on or in the casting could cause the coating to fail. If it's on the outside, it would just flake off... On the inside it could flake off an cause an issue with your transmission internals.

How much is it leaking? If it's just a drip or 2, I would probably just leave it and monitor my oil level, which is important in these coaches anyway. More then that, I would probably not coat the inside, if it was me. If it's a new pan, I would probably consider contacting Ragusa, as the best option would be to replace it, if it is weeping.

Karen, it would have better if you had asked this question BEFORE you
installed the pan. I could have saved you a few steps in this process. I
too have a Ragusa Pan on my transmission. It too seeped fluid. The casting
is porus and tranny fluid is very thin when it is warm. I removed my pan
with the intention of sealing it some way. I have a friend with a
transmission shop, and he has a handy dandy parts washer and special
solvents that gets rid of all traces of transmission fluid. After I paid
him a nominal sum to wash my pan, I coated it with 2 thick coats of GLYPTAL
INSULATING VARNISH. Then I baked it in my powder coating oven overnight at
125 degrees. The baking step speeds up the cure rate of the varnish. It
will air dry, but takes several days. I reinstalled the pan. It has been
several years and a couple of cross country trips and so far, no leaks.
Nothing is forever, but this comes close. I wouldn't try powder coating or
line-x bedliner. But, you do as you want. It is your money and time that
you are spending.
Jim Hupy

On Sep 22, 2017, at 12:07 PM, KB wrote:

> The only problem with the glyptal is it's insulating.


Glyptal is an *electrically* insulating coating that was developed to coat parts that operate at high voltages such as in transformers, motors, generators or other electrical gear. "Insulating" - at least in terms of glyptal - refers to its electrical properties and not its thermal properties. A mm-thick or so coating isn't going to make any difference at all in the ATF temperature.

And I, too have had an uncoated Ragusa pan that weeped ATF. JimK sent me another one that did not weep.

I would not hesitate for a second to coat the inside of a new tranny pan with Glyptal - it is used inside of engines fairly often.