Replacing 727 Low/Reverse Band Pin O-Ring in Car

I've been lazy and just cleaned the area really well and covered it in RTV. It never leaked again!

I've also just cut the nub off of the tail housing and knocked the pin out far enough to swap the o-rings. Knocked the pin back in and ran it. My current 727 has been "modified" that way. No issues but I completely understand why someone would want to do the job properly. I just hate messing with the snap ring in the tail housing! It always kicks my butt.