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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Leaking Trans -E4OD

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Old Feb 16, 2023 | 09:27 PM
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Leaking Trans -E4OD

Hi,

My 93 f150 recently started leaking tranny fluid.(E4OD). I went under it today, I can see the fluid around the pan gasket and a lot of build up around the bell housing, and shaft exit(2wd). I did the gasket, filter and fluid less than a year ago and it was fine for a while but just started leaking. It's a cork gasket, could that be the problem? I already checked, all the bolts are tight. I live in MA, currently the truck is in storage, and covered (I finished restoring it about a year ago.) A couple weeks ago we hit -15, could that have caused any problems?

Thanks!
 
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Old Feb 16, 2023 | 10:49 PM
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Cork is not ideal, but if the pan flange has it's bolt holes dimpled the least bit from over-tightening, it's usually a lost cause in the long run.

I've got a thick piece of glass I set things like that on to check for flatness & warpage.

A reusable synthetic is worth the extra cost after any distortion is corrected or a replacement is found.
 
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Old Feb 17, 2023 | 02:58 PM
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Might want to watch this


The stock pans or the Dorman replacement pans have a tendency to dimple and warp along the pan rail and leak. I'm mostly a "Keep it original" guy but sometimes the aftermarket does do it better.


 
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Old Feb 17, 2023 | 03:10 PM
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A 1993 came originally with a cork gasket but later year pans could have been swapped instead.
A cork/paper or rubberized material should only be used on a pan that has raised ribs between the bolt holes.
If the pan has a smooth mounting surface and/or the pan has the notation "pan is equiped with a reuseable gasket" stamped into it, you will need to use the re--useable ford gasket ‎F6TZ-7A191-A

Don't over tighten the pan bolts. They strip out VERY EASILY!
 
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Old Feb 17, 2023 | 09:34 PM
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I did my trans a couple years ago, cork replacement, torqued the bolts to spec,10-12 ft-lb, easy to overtighten by hand.
If the cork compresses too much, it will be crushed and will leak.
 
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