727 and 904, which Gasket do you like?

summit aluminum leaked when my dad had the car....and that was with the Mopar gasket. Swapped it to a deep 48RE pan and problem solved... Either way, love the mopar gasket!

The 500 for a 904 or 518 for a 727 pans

Is that the black plastic gasket with the double ( super thin) o ring type perimeter seal? They work [censored] with cast aluminum pans, I have that one on my 727 but it doesnt seal with the deep 904 mopar steel pan.

Whats the part number for the grey ribbed steel reinforced silicone gasket? Do they still make that one?

....and I've had the pan off my truck (47RE/727 shape) several times for service etc and still have the same gasket it was born with. 125 inch lb torque. About the same with the race car swapping t-brakes, service etc.... steel stock pan, mopar gasket, even torque for the win!

Only experience is with the 727

Can't beat a cast pan with machined surfaces
This one's a TCI

I have the summit pan, thick rail & a a&have reusable pan gasket. 904, dry as a bone.

I just use the cheapo cork gasket.. it dont leak
with the cast pan.. I just use the stock cast
pan on the 518(727) but its deep

Factory truck pan. They're 1" deeper than the deep pans. Stock reusable gasket. I've had mine off and on for 3 years , no leak.
Doug

B&M pan after removing the MOPAR chrome deep pan

Yeah the MP deep pan isn't exactly flat, might have to belt sand it like I do with them Chinese Fab aluminum Valve covers.

It only seems to drip with the Mopar 'o ring reuseable ' gasket in the very front (where the gasket is for some reason much thinner).

Theres not a huge selection of Cast Alum pans for the 904, not like the 727. It shouldn't cost $150 of new parts to stop a leak, you wouldn't think, lol.

DVW ,do you have a part number for the factory truck pan?

On the 518 I just put together and is in the
car now is the factory 518 steel pan.. its a
deep one and I believe is the same as the truck
pan.. it comes stock on them
EDIT
No P/N other than the junk yard

Greg is that a Superformance gasket on that 727 pan? I couldn't remember if I asked you if you make those or not? I need to upgrade my deep steel pan to a cast aluminum pan, it seems to leak no matter what I try.

I forgot to get a SUPERPERFORMANCE trans pan gasket

he said in the other thread he didn't make trans pan gaskets at this time, so maybe a prototype for testing purposes ?

The gasket pictured is prototype #3
#2 is on my charger with the stock steel pan and seems to be working very well. #1 was destined for the Barracuda but ended up on a fellow racers NSS Coronet who was in panic mode trying to seal his pan. Believe he was using the MP deep pan and I'll have to ask if there are any puddles under his car, been a few years since he installed it.

The newer style over-molded carrier type gaskets are a nice concept however, the only sealing contact are the thin raised beads. A gasket made of quality material has way more sealing surface area. JMO

I would like to make these along with many other products but it's hard enough to keep up with what's going out the door now

If Superformance wants to send me enough to make a pan gasket..... "I'm your Huckleberry!"

I'll bet most MP steel pans leak between the middle 2 front holes, I'm thinking about just making a 1/4" thick steel bar "straddle Plate" and use longer bolts. If it has the slightest bow it's a clamping issue.

If you want to go to the dealership and try and get the trans pan that DVW is talking about I think this is a part # that will work. 52118780AD with gasket 02464324AC. These #'s are for a 46RE but I am almost positive it shares the same shape as the 727/518 trans. But like Mr P-Body said, junkyard will probably be easier and cheaper than going the dealership route.
Grossey

I'm having good luck with the Moroso gasket:

Moroso 727 gasket