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Re: [GMCnet] porous aluminum tranny pan [message #324327 is a reply to message #324305] Sun, 24 September 2017 22:03 Go to previous messageGo to previous message
Adrien G. is currently offline  Adrien G.   United States
Messages: 474
Registered: May 2008
Location: Burns Flat, OK 73624
Karma:
Senior Member
Ken,

Put tranny fluid in the pan, put it back in the oven and bring it up to operating temp, if the outside surface is dry then it should be ok.

Whatever substance is used to seal the inside surface, the gasket surface must also be sealed with it,or some weeping can occur from there.

Aluminum sand castings when heated are porous, aluminum die castings are not.


Ken Henderson wrote on Sun, 24 September 2017 07:49
Thanks for that experienced report, Justin. I'll try ATF. In fact, I'll
go ahead and drain the transmission into the "new" pan and let it set until
I'm ready to refill before the next trip in a couple of weeks. If it looks
"iffy", I'll keep the old pan (which is one of the Toronado tow option pans
with fore-aft tubes through the bottom for cooling).

Ken H.


On Sun, Sep 24, 2017 at 10:43 AM, Justin Brady wrote:

> If you fill the pan with gas you'll likely have no paint in the morning.
> Duplicolor engine enamel is great stuff but long term gas exposure is an
> issue. I've had it flake off of properly prepared engines when the carb
> starts leaking heavily. (motorcycle)
>
> I'd fill it with atf, since that's all it's going to see and let it sit
> for a week or so and check it out.
> --
> Justin Brady
> http://www.thegmcrv.com/
> 1976 Palm Beach 455
>
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Adrien & Jenny Genesoto 75 Glenbrook (26-3) Mods LS3.70 FD / Reaction Sys / 80mm Front&Intermidiate / Hydroboost / 16" Tires / Frame Rebuild / Interior Rebuild Yuba City,Ca. Text 530-nine-3-three-3-nine-nine-6
 
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