What kind of sample size do we have for the rubber gasket option? Looks like Beck/Arnley and Wix are the main choices. Sounds like
@Boland01 had success in using the rubber trans pan gasket instead of RTV. It is likely a whole hell of a lot easier than this RTV fiasco; and if it means it’s easier to drop the pan again 50k miles later as well, I’m all for it.
Could do a combo of a thin layer of Permatex ATF RTV between the rubber gasket and pan surface only. Therefor you won’t have to scrape any residue off the transmission case on the next time around. It also looks like you want to be on the lower side of the torque spec interval if using the rubber gasket though to prevent too much deformation.
I’m too worried about sending RTV straight into the transmission pan upon compressing to then mix with the fluid. If I were to do it at all, it’d be a thin layer rubbed uniformly just like in the previously referenced video.