727 leak

[63SplitWindow]

When I rebuilt the trans last year I changed out the stock pan for a B+M cast aluminum deep pan. I have a leak that appears to be coming from the pan seal. I have changed it out twice but still have a leak. I have been using the paper gaskets. Should I try the rubber one?

 

[Icetech]

When I rebuilt the trans last year I changed out the stock pan for a B+M cast aluminum deep pan. I have a leak that appears to be coming from the pan seal. I have changed it out twice but still have a leak. I have been using the paper gaskets. Should I try the rubber one?

yes.. anytime you have milled/smooth surface to smooth surface go with silicone/rubber... and don't over tighten or they will leak. this one isn't cheap but if you leak with it something else is wrong...

P.S. i still glue my gaskets so i never worry bout a leak. (a very thin layer of black rtv on bother sides) spread super thin with my finger so it wont' squish into the trans..

Amazon.com: Moroso GASKET, TRANS, TORQUEFLITE 727 (93110) : Automotive

Buy Moroso GASKET, TRANS, TORQUEFLITE 727 (93110): Gaskets - Amazon.com ✓ FREE DELIVERY possible on eligible purchases

www.amazon.com

 

[Michael Siple]

Mine pan is usually wet with no constant dripping leaks. I'm convinced my leak is fluid related. Using ATF+4 full synthetic - want to try a conventional fluid to see if it helps. No constant drip - but droplets are always on pan. Experienced this before on my pickup trk. Synthetic leaked everywhere it could. Switched to conventional & it stopped. Don't have any explanation. Next tranny fluid change going to try something different to see if it helps.

 

[340six]

The Mopar gasket for newer 47re with the O-Ring.

 

[63SplitWindow]

Interesting note about the synthetic. That is what I am using.
I will try the rubber gasket first to see if that works. If not, back to conventional ATF.....If it is still available.

 

[63SplitWindow]

The Mopar gasket for newer 47re with the O-Ring.

I'm not familiar with that. Does that require a matching pan and gasket set?

 

[71Demon540]

I'm not familiar with that. Does that require a matching pan and gasket set?

Go with the moroso blue gasket. Best gasket made.

If it still leaks after, check the shift shaft seal and the little gasket on top of the rooster comb into the valve body. You can get both out in the car.

 

[340six]

I'm not familiar with that. Does that require a matching pan and gasket set?

Noting special needed to be used with stock stamped pan or aluminum pan
It is the stock one used by Mopar. Has O-Ring and is reusable

 

[413]

Check all 5 of the other leak points just above the pan. Band adjust bolt, low band shaft, NSS, shift shaft seal, dipstick o-ring. Any of those leak and the pan will have drips hanging off it. Don't assume anything

 

[Bewy]

I have been using full synthetic ATF for 25 years.....with silicon only as the 'gasket'....& am yet to have a leak.

 

[63SplitWindow]

Check all 5 of the other leak points just above the pan. Band adjust bolt, low band shaft, NSS, shift shaft seal, dipstick o-ring. Any of those leak and the pan will have drips hanging off it. Don't assume anything

So far, everything above the pan is dry.

 

[RustyRatRod]

Put this on it.

LubeLocker LLT-A727 LubeLocker Transmission Pan Gaskets | Summit Racing

Free Shipping - LubeLocker Transmission Pan Gaskets with qualifying orders of $109. Shop Transmission Pan Gaskets at Summit Racing.

www.summitracing.com

 

[TrailBeast]

I'm not familiar with that. Does that require a matching pan and gasket set?

You could also get a rubber coated steel gasket for the A518 trans.
I run one and have zero leaks.
With any rubber gasket you may need longer pan bolts.

 

[scatpakman]

Following