What transmission pan gasket

[blown motor]

I have to replace the transmission pan gasket on a 727. What should I use? Cork, rubber, silicone?

[Bullitt-]

some options I dug up

https://www.manciniracing.com/mo727reoepan.html
filter
https://www.manciniracing.com/ma727trfi.html

Think this is one that gets some recommendations
https://www.rosevillemoparts.com/product/pan-gasket-new-style-plastic-with-seal-727/

[73_Cuda_4_Me]

I replaced the pan gasket in my 727 with a reusable silicone/steel core unit available right at Ma Mopar... don't have the number for it, but I believe the number was given in a thread either on here somewhere or over at cc.com... was around 35 bucks, but it sure sealed mine up...

Here... https://forum.e-bodies.org/engine-transmission-and-rear-end/4/difficulty-of-resolving-this-transmission-leak/7664/msg107427#msg107427

[jimynick]

Murray, that $35.00usd or $44.50 Canadian before tax or shipping would buy you a nice big tube of "The Right Stuff" which would not only do the job, but have some left over for future sealing chores. Just sayin' 

[MoparLeo]

The silicone gasket 9s also reusable and has a metal insert so you don't overtighten it like so many do.
I also believe the factory recommended torque for the pan gasket is 150 in lbs.

[blown motor]

@MoparLeo How many ft lbs is that?

[Bullitt-]

@MoparLeo How many ft lbs is that?

12.5 ft lbs
https://online-calculator.org/150-inch-pounds-to-foot-pounds

[MOPAR MITCH]

Regardless whatever gasket you use, the most important factor is the flatness of the mating surfaces (especially a stamped steel-type factory pan), along with the bolt holes and bolts having cleaned threading for proper equal clamp load.

An out-of-flat and/or dimpled bolt hole common with stamped steel trans pans would need to be repaired, replaced or else, use of a very forgiving gasket upon being compressed.

Personally, I favor the Fel-Pro rubber coated dense fiber trans pan gaskets -- very resilient to the constant wall of trans fluid, and can be reused (at your discretion).

Forget about plain cork-rubber gaskets -- they will just saturate and eventually leak fluid.

Silicone gaskets with the center metal/steel core are great, but they are not much forgiving to out-of-flat pans or distorted bolt holes.... better to use a nice new and flat cast aluminum pan with those gaskets.

I'm a former gasket applications engineer with a major company.