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Re: [GMCnet] porous aluminum tranny pan [message #324187 is a reply to message #324183] Fri, 22 September 2017 09:32 Go to previous messageGo to previous message
James Hupy is currently offline  James Hupy   United States
Messages: 6806
Registered: May 2010
Karma:
Senior Member
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 Fri, Sep 22, 2017 at 7:09 AM, Mark Sawyer
wrote:

> 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.
> --
> Mark S. '73 Painted Desert,
> Manny 1 Ton Front End,
> Howell Injection,
> Leigh Harrison 4bag and Rear Brakes,
> Fort Worth, TX
>
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