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Re: [GMCnet] porous aluminum tranny pan [message #326123 is a reply to message #326120] Fri, 17 November 2017 19:55 Go to previous messageGo to previous message
Ken Henderson is currently offline  Ken Henderson   United States
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
Senior Member
Karen,

Thanks for reminding me that I haven't reported on my Ragusa pan coating
results: After 3+ weeks of using the pan I painted inside and baked, I can
report that I've lost about a pint of fluid...

It's now obvious that the porosity, if it ever had any, is cured. But,
there is leakage at the rear of the pan only, probably from the flange, but
possibly from the chain cover. Because the leaks run down the side of the
pan without leaving an easily detected trail, the drops on the flanges at
the bottom of the pan appear to be coming through the aluminum -- they're
NOT.

I'm using a nicely made Felpro composition gasket, Permatex'd to the pan
(but not the transmission). I did not paint the pan's flange, as someone
suggested too late, but that aviation Permatex should certainly prevent any
leakage there. So, I'm still keeping a drip tray under the transmission
and don't know what to try next -- unless I R&R the chain cover and reseal
it as well -- but Manny probably used Permatex on both sides of that
gasket. :-(

Ken
​Drippy ​
H.


> On Fri, Nov 17, 2017 at 5:48 PM, KB wrote:
>
>> For the record, Ragusa very kindly sent me a replacement pan, which I
>> immediately coated with glyptol, baked as suggested, and installed.
>> Chase at Ragusa pressure tested the old pan and found that it is NOT
>> porous/leaking. Good folks there at Ragusa, and I feel bad for returning
>> what apparently is/was a good pan. Sure as heck looked like it was
>> porous, but apparently not. :blush:
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach

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