With the vehicle parked on a level floor the oil should come to the bottom of the fill hole. That places the level just below the centerline of the input/output shafts and prevents leakage out of either end. The rotation of the gears (especially the big bull gear for 1st.) circulates the lube inside the case.
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!