I’m sure I’m tempting fate here, but we pulled my transmission last week to fix a different leak (tranny input shaft seal) and briefly contemplated putting on the breather hose fix, even though mine has never leaked from the breather.
Anyway, we found a length of hose that was a good snug fit on the nub of the breather, and secured it with a small std. hose clamp. (The nub is about 0.5" tall, so it seemed secure enough for the hose clamp to bit into.
So far so good, but what made us stop was that it looked like the hose was going to foul against the bottom of the tranny tunnel, and we weren’t in the mood to expand it with a BFH or rig up a 90 elbow. So, since in my case it wasn’t broken, we didn’t fix it. (See what I mean about asking for it?)
Jeremy, I can’t imagine doing the vent hose project with the trans in the car, and I’d be prepared to spend a bit of time making sure you had clearance to route the house when it goes back together. Just my .02 anyway.