That method's worked on just about every manual trans I've ever serviced. Just be sure not to get the lube level up to the point where the input and output shafts are submerged, ot it's almost impossible to avoid a leak.
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!