Just wanted to ask how others feel about painting a transmission. I'm debating whether or not to paint my 727 before I install it.

Naw. Leave it raw finished.

It will stay nicer painted. As cast paint would be a good choise

Paint the pallet instead.

I've seen them painted silver, looks like a lot of wort that was hardly noticed.
I've seen them painted black, those kind of get lost under the vehicle.
I had a 4x4 unit painted blue, looked really out of place against the orange small block in the truck, but it was a great trans, 12 years of plowing snow without an issue. It got broken when the truck got wrecked.
Painting a trans is a lot of work for something pretty hard to see most of the time, imho.

If you want to keep some more heat in it, paint it.
If not don't

Have used Dull Aluminum Lacquer in a rattle can on transmissions. Works well.

Don't need to get it on real heavy, just enough to where it looks nice.

send the case to 340SIX. he will POLISH it for you................

unless you have a see thru floor, the only part you see is the bell housing from the top..My Cudas still has the yellow and black stripes from Fairbanks...or a silver gray paint from another company.

I've used plasti Kote rebuilders cast finish with good results and just looked at AMZ for cast aluminum paint. Holy cr-p Uncle joes economics are really driving the prices up. Did also see this which is very reasonably priced. I like others usually just fog it on to get a clean even look.
Aluminum paint

No paint.

Painting seals the pores in the casting, dirt won't cling as readily as bare.

I want stuff to look nice. I don't want it to look like I just pulled it out of an old truck in the junkyard.. If I can clean it to suit me, I leave it. If not, it gets cast iron color high heat paint.

Some castings are smother than others. I've had some Glide cases that were nice and cleaned up well.

Oven cleaner and elbow grease. I don't like to glass bead that stuff.

Candy Apple Red with gold leaf edging, or a carbon fiber wrap.

Add some hand laid pin stripes and ya talking.
As cast, dull aluim. Krylon and may others are a great chosie instead of a porous surface that will stain and dirty easy.
Light coat fogged on is best. Even Duplicolor silver engine works good but light costs from a distance will give a non gloss look
I was forgetting about VHT plus many other good spray bombs out there.

i recently did some wheels with rustoleum "implement" spray bombs, over their etching primer on the bare [blasted] wheels.
i used "massey -ferguson" gray. it turned out really nice.
i was surprised that it only took two coats per wheel [the face only] and i didn't use up one can !
the back sides and the barrel of the wheel the tire rides on, was painted with red oxide rustoleum and their regular black spray bombs.
i can't remember just how many colors the "implement" spray bombs come in, but if the other colors spray out as nice as mine did, and you can find a color you can live with, that may be an alternative.
i know regular automotive paint can stand up to engine heat, so i would think a quality spray bomb may do the same.
i think the secret in the spray bomb comment is the word "quality".
unfortunately, someone has to try it to see.
i am seriously considering using the "implement" paint on the 440 and 727 i have almost ready to install into my charger, so i may end up being the one to find out how it stands up.

Buddy of mine soda blast them first then clear coats.

My son painted his after we blasted the case and rebuilt it.