I just got done tonight painting my transmission. Took me an hour and a half (get really fussy when i have to paint things on my car) to get all the sensors and bolt threaded area sealed off. Any way i painted it gloss black since i had the transmission out. Figured i might as well do it now. It will help me out by keeping the heat down and especially all the dirt and oil that collects on it. Took me two big cans of Gunk to de-grease it. Well atleast it came out nice.
Toom so long to prep it and oly 15 minutes to paint it.
I used 500 F temp paint that has ceramic particles in it. I recommend painting your tranny if you have it out. Its worth the hassel.