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-   -   After-market trans pans - why fibre gasket required? (https://www.cumminsforum.com/forum/3rd-gen-powertrain/2513685-after-market-trans-pans-why-fibre-gasket-required.html)

unbob 10-16-2019 12:03 AM

After-market trans pans - why fibre gasket required?
 
Wondering why Mag-Hytec, Goerend, etc specify that only a fibre gasket be used with their trans pans. Anyone here know why?

I have the Mag-Hytec pan and there's always some leakage with the fibre gasket. Never had any leakage with the stock pan/gasket!

Also, the hex bolts provided with the Mag-Hytec pan are a pita:frown2: compared to the stock standard bolts.

4everlearning 10-16-2019 12:25 AM

Because, there’s no lateral support from the aftermarket pans. I have a B&M pan with a silicone lined gasket that doesn’t leak at all.

unbob 10-16-2019 12:37 AM

Quote:

Originally Posted by 4everlearning (Post 29116081)
Because, there’s no lateral support from the aftermarket pans. I have a B&M pan with a silicone lined gasket that doesn’t leak at all.

Re "lateral support", are you referring to the "lip" on the stock pan?

Apparently some are using the stock Mopar OEM gasket with these aluminum pans - with no leakage problem! Anyone hear otherwise?

4everlearning 10-16-2019 12:44 AM

The lip or on our trucks there’s no lip but there is a bit of a ridge that runs down the middle of the surface.

ofelas 10-16-2019 06:28 AM

I prefer Lubelocker gaskets on aluminum pans, and the rigid factory gasket on steel pans.

Both the above gaskets are reusable.

24hrsparkey 10-16-2019 07:09 AM

Whatever you do ,, do not use the thick oem gasket on one of the huge alum aftermarket pans.

Bolts are too short , bad times for the trans threads . dont ask.

unbob 10-16-2019 11:33 AM

Quote:

Originally Posted by 24hrsparkey (Post 29116187)
Whatever you do ,, do not use the thick oem gasket on one of the huge alum aftermarket pans.

Bolts are too short , bad times for the trans threads . dont ask.

Bingo! I think you've answered my question. That thought never occurred to me. Thanks for the reply amigo!

02smokin 10-16-2019 11:42 AM

Fiber gasket here no leaks. Most people over tighten the bolts which crushes the fiber gasket causing leaks. 10ftlbs is all ya need

unbob 10-16-2019 12:02 PM

Quote:

Originally Posted by ofelas (Post 29116181)
I prefer Lubelocker gaskets on aluminum pans, and the rigid factory gasket on steel pans.

Both the above gaskets are reusable.

Thanks! Too bad the dealer list on LubeLocker's web site doesn't work - I need a gasket today!!

$40.16 incl tax/shipping. That's a no-go for me. Seriously, $40 bucks for a gasket?

ofelas 10-16-2019 02:40 PM

$25 at Summit.

If one's counting to save $ - then, as mentioned above, 10 lbs-ft on a DRY fiber gasket does the trick just fine.

Dynamic 10-18-2019 11:50 AM

You should go back and retorque the fiber gaskets after about a week. 10-12 ft lbs... No leaks, and maximum transfer of the pan's structural rigidity to the case (which is one of the main reasons for running an aluminum pan).

unbob 10-19-2019 02:45 PM

Quote:

Originally Posted by ofelas (Post 29116479)
$25 at Summit.

$38.61 incl tax & shipping.


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