That vent hole in the slip yoke isn't an exercise in theoretical semantics- - - - -I've fixed several chronic leakers by plugging it up. It's several inches lower than the case vent near the front of the transmission.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!