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Re: [GMCnet] porous aluminum tranny pan [message #324234 is a reply to message #324172] Fri, 22 September 2017 17:49 Go to previous messageGo to previous message
Grrumpy is currently offline  Grrumpy   United States
Messages: 13
Registered: September 2015
Location: Chesapeake, Virginia
Karma:
Junior Member


I had the same problem. Removed the pan three times. $150 in ATF later I found that the Final drive gasket was the problem. A single drop off ATF will cover everything under the hood. A few drops and you think everything is leaking.  Check the Final drive gasket b4 you go any further. I had to super clean everything with brake clean and lay under the coach for half an hour b4 I found it.


Happy Connecting. Sent from my Sprint Samsung Galaxy S® 5 Sport

-------- Original message --------
From: KB
Date: 9/22/17 12:01 PM (GMT-05:00)
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] porous aluminum tranny pan

TR 1 wrote on Fri, 22 September 2017 07:09
> 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.


1. Yes, we can see the tiny leaks all over the surface of the pan.  Every fin has a drop of fluid hanging on the end.  I have
    checked and replaced the gasket more than once.
2. I'd prefer to keep the cooling ability if possible, but the best feature is the drain plug.  A non-insulating coating would be nice.
3. That's why I'm asking here.  I know others have run into the problem before.
4. It's a significant leak.  We have to put something under it or it'll make a big mess.  We also check and top off the fluid before driving.   It
needs to be fixed.

thanks,
Karen
1975 26'


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Bob & Elena Myers Chesapeake Va. 1978 Transmode--Builder??? All electric If you wish to live forever, pass on your knowledge to others.

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